/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-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:26:40,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:26:40,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:26:40,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:26:40,985 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 [2021-04-15 02:26:41,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:26:41,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:26:41,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:26:41,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:26:41,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:26:41,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:26:41,018 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:26:41,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:26:41,018 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:26:41,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:26:41,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:26:41,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:26:41,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:26:41,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:26:41,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:26:41,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:26:41,021 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:26:41,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:26:41,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:26:41,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:26:41,309 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:26:41,310 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:26:41,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-04-15 02:26:41,311 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-04-15 02:26:41,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:26:41,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:26:41,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:26:41,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:26:41,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:26:41,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:26:41,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:26:41,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:26:41,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:26:41,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,366 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/1) ... [2021-04-15 02:26:41,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:26:41,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:26:41,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:26:41,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:26:41,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (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 [2021-04-15 02:26:41,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:26:41,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:26:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:26:41,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:26:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:26:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:26:41,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:26:41,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:26:41,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:26:41,425 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:26:41,616 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:26:41,616 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:26:41,617 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:26:41,617 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 02:26:41,618 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:26:41 BoogieIcfgContainer [2021-04-15 02:26:41,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:26:41,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:26:41,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:26:41,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:26:41,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:26:41" (1/2) ... [2021-04-15 02:26:41,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bee2eef and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:26:41, skipping insertion in model container [2021-04-15 02:26:41,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:26:41" (2/2) ... [2021-04-15 02:26:41,622 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-04-15 02:26:41,625 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:26:41,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:26:41,627 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:26:41,628 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:26:41,643 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:26:41,653 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:26:41,664 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:26:41,664 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:26:41,664 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:26:41,664 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:26:41,664 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:26:41,665 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:26:41,665 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:26:41,665 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:26:41,669 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-04-15 02:26:41,675 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) [2021-04-15 02:26:41,676 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) [2021-04-15 02:26:41,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 02:26:41,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:41,679 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:41,679 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-04-15 02:26:41,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:41,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102703626] [2021-04-15 02:26:41,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:41,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102703626] [2021-04-15 02:26:41,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:26:41,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:26:41,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212642339] [2021-04-15 02:26:41,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:26:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:26:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:26:41,780 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) [2021-04-15 02:26:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:41,793 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-04-15 02:26:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:26:41,794 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 [2021-04-15 02:26:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:41,799 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:26:41,799 INFO L226 Difference]: Without dead ends: 19 [2021-04-15 02:26:41,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:26:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-15 02:26:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-04-15 02:26:41,820 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) [2021-04-15 02:26:41,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-04-15 02:26:41,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-04-15 02:26:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:41,822 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-04-15 02:26:41,822 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) [2021-04-15 02:26:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-04-15 02:26:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:26:41,822 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:41,822 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:41,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:26:41,823 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:41,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-04-15 02:26:41,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:41,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499864090] [2021-04-15 02:26:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:41,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499864090] [2021-04-15 02:26:41,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171297142] [2021-04-15 02:26:41,855 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 [2021-04-15 02:26:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:26:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:41,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:41,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 02:26:41,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825002234] [2021-04-15 02:26:41,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:26:41,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:26:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:26:41,992 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-04-15 02:26:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,018 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-04-15 02:26:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:26:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 10 [2021-04-15 02:26:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,019 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:26:42,019 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:26:42,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:26:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:26:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-04-15 02:26:42,023 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) [2021-04-15 02:26:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-04-15 02:26:42,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-04-15 02:26:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,023 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-04-15 02:26:42,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2021-04-15 02:26:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-04-15 02:26:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:26:42,024 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,024 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:42,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:26:42,237 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-04-15 02:26:42,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:42,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977381802] [2021-04-15 02:26:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:42,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977381802] [2021-04-15 02:26:42,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:26:42,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:26:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704140775] [2021-04-15 02:26:42,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:26:42,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:42,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:26:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:26:42,273 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) [2021-04-15 02:26:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,302 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-04-15 02:26:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:26:42,303 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 [2021-04-15 02:26:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,306 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:26:42,306 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:26:42,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:26:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:26:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:26:42,324 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) [2021-04-15 02:26:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-04-15 02:26:42,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-04-15 02:26:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,327 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-04-15 02:26:42,327 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) [2021-04-15 02:26:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-04-15 02:26:42,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:26:42,327 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,327 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:42,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:26:42,328 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-04-15 02:26:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:42,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56984897] [2021-04-15 02:26:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:42,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56984897] [2021-04-15 02:26:42,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:26:42,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:26:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949196731] [2021-04-15 02:26:42,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:26:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:26:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:26:42,374 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) [2021-04-15 02:26:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,391 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-04-15 02:26:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:26:42,392 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 [2021-04-15 02:26:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,393 INFO L225 Difference]: With dead ends: 20 [2021-04-15 02:26:42,393 INFO L226 Difference]: Without dead ends: 20 [2021-04-15 02:26:42,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:26:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-15 02:26:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-15 02:26:42,397 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) [2021-04-15 02:26:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:26:42,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:26:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,398 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:26:42,398 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) [2021-04-15 02:26:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:26:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:26:42,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,398 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:42,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:26:42,399 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-04-15 02:26:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:42,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418458479] [2021-04-15 02:26:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418458479] [2021-04-15 02:26:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325602946] [2021-04-15 02:26:42,441 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 [2021-04-15 02:26:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:26:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:42,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:42,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:26:42,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000177369] [2021-04-15 02:26:42,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:26:42,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:26:42,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:26:42,515 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) [2021-04-15 02:26:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,526 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-04-15 02:26:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:26:42,526 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 [2021-04-15 02:26:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,526 INFO L225 Difference]: With dead ends: 24 [2021-04-15 02:26:42,526 INFO L226 Difference]: Without dead ends: 24 [2021-04-15 02:26:42,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:26:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-04-15 02:26:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-04-15 02:26:42,528 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) [2021-04-15 02:26:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-04-15 02:26:42,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-04-15 02:26:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,529 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-04-15 02:26:42,529 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) [2021-04-15 02:26:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-04-15 02:26:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:26:42,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,530 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:42,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:42,747 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:42,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-04-15 02:26:42,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:42,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322045412] [2021-04-15 02:26:42,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:42,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322045412] [2021-04-15 02:26:42,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318145551] [2021-04-15 02:26:42,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:26:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:26:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:42,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:42,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:26:42,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652729414] [2021-04-15 02:26:42,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:26:42,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:26:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:26:42,865 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) [2021-04-15 02:26:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:42,895 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-04-15 02:26:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:26:42,896 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 [2021-04-15 02:26:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:42,896 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:26:42,896 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:26:42,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:26:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:26:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-04-15 02:26:42,898 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) [2021-04-15 02:26:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-04-15 02:26:42,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-04-15 02:26:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:42,899 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-04-15 02:26:42,899 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) [2021-04-15 02:26:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-04-15 02:26:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:26:42,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:42,899 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:43,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,113 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-04-15 02:26:43,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:43,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247119561] [2021-04-15 02:26:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247119561] [2021-04-15 02:26:43,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547565302] [2021-04-15 02:26:43,166 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 [2021-04-15 02:26:43,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:26:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:43,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:26:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:43,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:26:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836230290] [2021-04-15 02:26:43,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:26:43,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:43,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:26:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:26:43,269 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) [2021-04-15 02:26:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:43,304 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-04-15 02:26:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:26:43,305 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 [2021-04-15 02:26:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:43,307 INFO L225 Difference]: With dead ends: 32 [2021-04-15 02:26:43,307 INFO L226 Difference]: Without dead ends: 32 [2021-04-15 02:26:43,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:26:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-04-15 02:26:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-04-15 02:26:43,312 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) [2021-04-15 02:26:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-04-15 02:26:43,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-04-15 02:26:43,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:43,312 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-04-15 02:26:43,312 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) [2021-04-15 02:26:43,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-04-15 02:26:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:26:43,313 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:43,313 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:43,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,521 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-04-15 02:26:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:43,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673685747] [2021-04-15 02:26:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673685747] [2021-04-15 02:26:43,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976358753] [2021-04-15 02:26:43,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:26:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:43,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:43,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 02:26:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960112463] [2021-04-15 02:26:43,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:43,700 INFO L87 Difference]: Start difference. First operand 32 states and 59 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) [2021-04-15 02:26:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:43,736 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-04-15 02:26:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:26:43,736 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 14 [2021-04-15 02:26:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:43,737 INFO L225 Difference]: With dead ends: 36 [2021-04-15 02:26:43,737 INFO L226 Difference]: Without dead ends: 36 [2021-04-15 02:26:43,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:43,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-04-15 02:26:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-04-15 02:26:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-04-15 02:26:43,747 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-04-15 02:26:43,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:43,747 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-04-15 02:26:43,747 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) [2021-04-15 02:26:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-04-15 02:26:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:43,748 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:43,748 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:43,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:43,949 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:43,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:43,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-04-15 02:26:43,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:43,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442573058] [2021-04-15 02:26:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:43,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442573058] [2021-04-15 02:26:43,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182464606] [2021-04-15 02:26:43,994 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 [2021-04-15 02:26:44,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:26:44,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:44,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:44,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:44,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:44,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:44,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:44,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:44,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:44,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:44,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84671340] [2021-04-15 02:26:44,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:44,315 INFO L87 Difference]: Start difference. First operand 36 states and 67 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) [2021-04-15 02:26:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:44,425 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-04-15 02:26:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:44,426 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 15 [2021-04-15 02:26:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:44,427 INFO L225 Difference]: With dead ends: 93 [2021-04-15 02:26:44,427 INFO L226 Difference]: Without dead ends: 90 [2021-04-15 02:26:44,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-04-15 02:26:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-04-15 02:26:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:44,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-04-15 02:26:44,438 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-04-15 02:26:44,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:44,438 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-04-15 02:26:44,439 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) [2021-04-15 02:26:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-04-15 02:26:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:44,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:44,439 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:44,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:44,645 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-04-15 02:26:44,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:44,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406505426] [2021-04-15 02:26:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:44,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406505426] [2021-04-15 02:26:44,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041961500] [2021-04-15 02:26:44,696 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 [2021-04-15 02:26:44,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:44,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:44,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:44,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:44,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:44,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:44,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:44,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:44,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:44,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:44,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:44,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682791812] [2021-04-15 02:26:44,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:44,946 INFO L87 Difference]: Start difference. First operand 49 states and 106 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) [2021-04-15 02:26:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:45,015 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-04-15 02:26:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:45,015 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 15 [2021-04-15 02:26:45,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:45,016 INFO L225 Difference]: With dead ends: 103 [2021-04-15 02:26:45,016 INFO L226 Difference]: Without dead ends: 100 [2021-04-15 02:26:45,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-04-15 02:26:45,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-04-15 02:26:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-04-15 02:26:45,030 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-04-15 02:26:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:45,031 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-04-15 02:26:45,031 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) [2021-04-15 02:26:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-04-15 02:26:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:45,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:45,034 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:45,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:45,251 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-04-15 02:26:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:45,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745605601] [2021-04-15 02:26:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:45,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745605601] [2021-04-15 02:26:45,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768980770] [2021-04-15 02:26:45,296 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 [2021-04-15 02:26:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:45,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:45,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:45,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:45,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:45,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:45,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:45,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:45,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712750540] [2021-04-15 02:26:45,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:45,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:45,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:45,508 INFO L87 Difference]: Start difference. First operand 57 states and 135 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) [2021-04-15 02:26:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:45,592 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-04-15 02:26:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:45,592 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 15 [2021-04-15 02:26:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:45,593 INFO L225 Difference]: With dead ends: 113 [2021-04-15 02:26:45,593 INFO L226 Difference]: Without dead ends: 110 [2021-04-15 02:26:45,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-04-15 02:26:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-04-15 02:26:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-04-15 02:26:45,596 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-04-15 02:26:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:45,597 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-04-15 02:26:45,597 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) [2021-04-15 02:26:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-04-15 02:26:45,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:45,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:45,597 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:45,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:45,801 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-04-15 02:26:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:45,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146953755] [2021-04-15 02:26:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:45,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146953755] [2021-04-15 02:26:45,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381304121] [2021-04-15 02:26:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:26:45,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:45,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:45,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:45,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:45,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:46,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:46,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:46,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:46,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:46,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:46,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321264242] [2021-04-15 02:26:46,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:46,073 INFO L87 Difference]: Start difference. First operand 66 states and 167 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) [2021-04-15 02:26:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:46,137 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-04-15 02:26:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:46,137 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 15 [2021-04-15 02:26:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:46,138 INFO L225 Difference]: With dead ends: 124 [2021-04-15 02:26:46,138 INFO L226 Difference]: Without dead ends: 121 [2021-04-15 02:26:46,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-04-15 02:26:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-04-15 02:26:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-04-15 02:26:46,147 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-04-15 02:26:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:46,149 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-04-15 02:26:46,149 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) [2021-04-15 02:26:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-04-15 02:26:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:46,152 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:46,152 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:46,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:46,353 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:46,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-04-15 02:26:46,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:46,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568541358] [2021-04-15 02:26:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:46,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568541358] [2021-04-15 02:26:46,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857113921] [2021-04-15 02:26:46,390 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 [2021-04-15 02:26:46,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:46,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:46,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:46,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:46,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:46,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:46,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:46,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:46,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:46,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149220573] [2021-04-15 02:26:46,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:46,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:46,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:46,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:46,558 INFO L87 Difference]: Start difference. First operand 76 states and 202 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) [2021-04-15 02:26:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:46,646 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-04-15 02:26:46,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:46,646 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 15 [2021-04-15 02:26:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:46,647 INFO L225 Difference]: With dead ends: 136 [2021-04-15 02:26:46,647 INFO L226 Difference]: Without dead ends: 133 [2021-04-15 02:26:46,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-04-15 02:26:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-04-15 02:26:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:46,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-04-15 02:26:46,650 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-04-15 02:26:46,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:46,650 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-04-15 02:26:46,650 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) [2021-04-15 02:26:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-04-15 02:26:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:26:46,651 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:46,651 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:46,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:46,852 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:46,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-04-15 02:26:46,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:46,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130589080] [2021-04-15 02:26:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130589080] [2021-04-15 02:26:46,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646472774] [2021-04-15 02:26:46,898 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 [2021-04-15 02:26:46,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:46,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:26:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:47,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:47,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-04-15 02:26:47,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:26:47,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:26:47,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:26:47,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-04-15 02:26:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:47,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:47,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-04-15 02:26:47,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126900468] [2021-04-15 02:26:47,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:26:47,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:47,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:26:47,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:47,112 INFO L87 Difference]: Start difference. First operand 87 states and 240 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) [2021-04-15 02:26:47,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:47,185 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-04-15 02:26:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:47,185 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 15 [2021-04-15 02:26:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:47,186 INFO L225 Difference]: With dead ends: 149 [2021-04-15 02:26:47,186 INFO L226 Difference]: Without dead ends: 146 [2021-04-15 02:26:47,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-04-15 02:26:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-04-15 02:26:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-04-15 02:26:47,198 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-04-15 02:26:47,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:47,198 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-04-15 02:26:47,198 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) [2021-04-15 02:26:47,199 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-04-15 02:26:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:47,199 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:47,199 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:47,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 02:26:47,409 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-04-15 02:26:47,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:47,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18905304] [2021-04-15 02:26:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:47,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18905304] [2021-04-15 02:26:47,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975082008] [2021-04-15 02:26:47,461 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 [2021-04-15 02:26:47,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:26:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:47,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:47,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:47,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699185102] [2021-04-15 02:26:47,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:47,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:47,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:47,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:47,525 INFO L87 Difference]: Start difference. First operand 100 states and 282 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) [2021-04-15 02:26:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:47,631 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-04-15 02:26:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:26:47,641 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 16 [2021-04-15 02:26:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:47,642 INFO L225 Difference]: With dead ends: 171 [2021-04-15 02:26:47,642 INFO L226 Difference]: Without dead ends: 171 [2021-04-15 02:26:47,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-04-15 02:26:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-04-15 02:26:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-04-15 02:26:47,647 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-04-15 02:26:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:47,648 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-04-15 02:26:47,648 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) [2021-04-15 02:26:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-04-15 02:26:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:47,648 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:47,648 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:47,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:47,861 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-04-15 02:26:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:47,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113728196] [2021-04-15 02:26:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:47,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113728196] [2021-04-15 02:26:47,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739301008] [2021-04-15 02:26:47,917 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 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 [2021-04-15 02:26:47,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:47,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:47,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:47,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:47,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098225894] [2021-04-15 02:26:47,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:47,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:47,968 INFO L87 Difference]: Start difference. First operand 103 states and 290 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) [2021-04-15 02:26:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:48,095 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-04-15 02:26:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:26:48,096 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 16 [2021-04-15 02:26:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:48,097 INFO L225 Difference]: With dead ends: 207 [2021-04-15 02:26:48,097 INFO L226 Difference]: Without dead ends: 202 [2021-04-15 02:26:48,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:26:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-04-15 02:26:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-04-15 02:26:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-04-15 02:26:48,100 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-04-15 02:26:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:48,100 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-04-15 02:26:48,100 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) [2021-04-15 02:26:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-04-15 02:26:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:48,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:48,101 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:48,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-04-15 02:26:48,305 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-04-15 02:26:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523536221] [2021-04-15 02:26:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523536221] [2021-04-15 02:26:48,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297241494] [2021-04-15 02:26:48,368 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 [2021-04-15 02:26:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:48,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:48,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116442979] [2021-04-15 02:26:48,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:48,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:48,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:48,427 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:48,501 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-04-15 02:26:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:48,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:48,503 INFO L225 Difference]: With dead ends: 152 [2021-04-15 02:26:48,503 INFO L226 Difference]: Without dead ends: 151 [2021-04-15 02:26:48,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-04-15 02:26:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-04-15 02:26:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-04-15 02:26:48,508 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-04-15 02:26:48,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:48,508 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-04-15 02:26:48,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-04-15 02:26:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:48,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:48,509 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:48,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:48,721 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:48,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:48,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-04-15 02:26:48,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:48,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891643902] [2021-04-15 02:26:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891643902] [2021-04-15 02:26:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3564510] [2021-04-15 02:26:48,762 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 [2021-04-15 02:26:48,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:48,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:48,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:48,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944824178] [2021-04-15 02:26:48,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:48,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:48,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:48,842 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:48,878 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-04-15 02:26:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:26:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:48,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:48,880 INFO L225 Difference]: With dead ends: 214 [2021-04-15 02:26:48,880 INFO L226 Difference]: Without dead ends: 214 [2021-04-15 02:26:48,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-04-15 02:26:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-04-15 02:26:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-04-15 02:26:48,885 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-04-15 02:26:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:48,885 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-04-15 02:26:48,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-04-15 02:26:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:48,887 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:48,887 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:49,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-04-15 02:26:49,097 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-04-15 02:26:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:49,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496919780] [2021-04-15 02:26:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496919780] [2021-04-15 02:26:49,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272432549] [2021-04-15 02:26:49,138 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 [2021-04-15 02:26:49,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:49,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:49,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:49,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:49,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759142905] [2021-04-15 02:26:49,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:49,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:49,192 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:49,277 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-04-15 02:26:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:26:49,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:49,278 INFO L225 Difference]: With dead ends: 211 [2021-04-15 02:26:49,279 INFO L226 Difference]: Without dead ends: 211 [2021-04-15 02:26:49,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:49,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-04-15 02:26:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-04-15 02:26:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-04-15 02:26:49,282 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-04-15 02:26:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:49,283 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-04-15 02:26:49,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-04-15 02:26:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:49,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:49,283 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:49,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 02:26:49,498 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-04-15 02:26:49,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:49,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842057398] [2021-04-15 02:26:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842057398] [2021-04-15 02:26:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258698156] [2021-04-15 02:26:49,534 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:49,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537247802] [2021-04-15 02:26:49,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:49,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:49,581 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:49,667 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-04-15 02:26:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:49,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:49,668 INFO L225 Difference]: With dead ends: 225 [2021-04-15 02:26:49,668 INFO L226 Difference]: Without dead ends: 223 [2021-04-15 02:26:49,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-04-15 02:26:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-04-15 02:26:49,671 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) [2021-04-15 02:26:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-04-15 02:26:49,672 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-04-15 02:26:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:49,672 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-04-15 02:26:49,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-04-15 02:26:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:49,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:49,672 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:49,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:49,889 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-04-15 02:26:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:49,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969112659] [2021-04-15 02:26:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:49,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969112659] [2021-04-15 02:26:49,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772527067] [2021-04-15 02:26:49,940 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 [2021-04-15 02:26:49,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:26:49,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:50,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:50,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:50,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417805116] [2021-04-15 02:26:50,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:50,008 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:50,080 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-04-15 02:26:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:50,082 INFO L225 Difference]: With dead ends: 206 [2021-04-15 02:26:50,082 INFO L226 Difference]: Without dead ends: 205 [2021-04-15 02:26:50,082 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-04-15 02:26:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-04-15 02:26:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-04-15 02:26:50,086 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-04-15 02:26:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:50,086 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-04-15 02:26:50,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-04-15 02:26:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:50,087 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:50,087 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:50,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-04-15 02:26:50,293 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-04-15 02:26:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:50,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204197859] [2021-04-15 02:26:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:50,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204197859] [2021-04-15 02:26:50,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713314580] [2021-04-15 02:26:50,332 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 [2021-04-15 02:26:50,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:50,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:50,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:50,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:50,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517201556] [2021-04-15 02:26:50,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:50,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:50,386 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:50,423 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-04-15 02:26:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:26:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:50,424 INFO L225 Difference]: With dead ends: 231 [2021-04-15 02:26:50,424 INFO L226 Difference]: Without dead ends: 231 [2021-04-15 02:26:50,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-04-15 02:26:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-04-15 02:26:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-04-15 02:26:50,429 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-04-15 02:26:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:50,429 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-04-15 02:26:50,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-04-15 02:26:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:50,429 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:50,429 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:50,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:50,645 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-04-15 02:26:50,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:50,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207773287] [2021-04-15 02:26:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:50,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207773287] [2021-04-15 02:26:50,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342673781] [2021-04-15 02:26:50,689 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 [2021-04-15 02:26:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:50,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:50,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:50,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920486547] [2021-04-15 02:26:50,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:50,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:50,774 INFO L87 Difference]: Start difference. First operand 139 states and 393 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) [2021-04-15 02:26:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:50,862 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-04-15 02:26:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:50,862 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 16 [2021-04-15 02:26:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:50,863 INFO L225 Difference]: With dead ends: 181 [2021-04-15 02:26:50,863 INFO L226 Difference]: Without dead ends: 179 [2021-04-15 02:26:50,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-04-15 02:26:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-04-15 02:26:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 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) [2021-04-15 02:26:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-04-15 02:26:50,866 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-04-15 02:26:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:50,866 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-04-15 02:26:50,866 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) [2021-04-15 02:26:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-04-15 02:26:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:50,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:50,867 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:51,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,077 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-04-15 02:26:51,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:51,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831452728] [2021-04-15 02:26:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831452728] [2021-04-15 02:26:51,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795493001] [2021-04-15 02:26:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:51,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:51,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:51,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276729520] [2021-04-15 02:26:51,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:51,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:51,173 INFO L87 Difference]: Start difference. First operand 140 states and 394 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) [2021-04-15 02:26:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:51,231 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-04-15 02:26:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:51,231 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 16 [2021-04-15 02:26:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:51,232 INFO L225 Difference]: With dead ends: 248 [2021-04-15 02:26:51,232 INFO L226 Difference]: Without dead ends: 248 [2021-04-15 02:26:51,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-04-15 02:26:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-04-15 02:26:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 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) [2021-04-15 02:26:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-04-15 02:26:51,235 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-04-15 02:26:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:51,235 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-04-15 02:26:51,236 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) [2021-04-15 02:26:51,236 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-04-15 02:26:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:51,236 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:51,236 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:51,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,452 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:51,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-04-15 02:26:51,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:51,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968691916] [2021-04-15 02:26:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:51,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968691916] [2021-04-15 02:26:51,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700408979] [2021-04-15 02:26:51,491 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 [2021-04-15 02:26:51,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:51,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:51,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:51,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:51,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213771564] [2021-04-15 02:26:51,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:51,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:51,545 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:51,590 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-04-15 02:26:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:26:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:51,591 INFO L225 Difference]: With dead ends: 230 [2021-04-15 02:26:51,591 INFO L226 Difference]: Without dead ends: 230 [2021-04-15 02:26:51,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:26:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-04-15 02:26:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-04-15 02:26:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-04-15 02:26:51,595 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-04-15 02:26:51,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:51,595 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-04-15 02:26:51,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,595 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-04-15 02:26:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:51,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:51,595 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:51,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:51,813 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-04-15 02:26:51,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:51,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555639754] [2021-04-15 02:26:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:51,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555639754] [2021-04-15 02:26:51,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853879367] [2021-04-15 02:26:51,848 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 [2021-04-15 02:26:51,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:51,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:51,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:51,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:51,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:51,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928950314] [2021-04-15 02:26:51,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:51,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:51,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:51,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:51,893 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:51,969 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-04-15 02:26:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:51,970 INFO L225 Difference]: With dead ends: 240 [2021-04-15 02:26:51,970 INFO L226 Difference]: Without dead ends: 238 [2021-04-15 02:26:51,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-04-15 02:26:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-04-15 02:26:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-04-15 02:26:51,974 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-04-15 02:26:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:51,974 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-04-15 02:26:51,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-04-15 02:26:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:51,980 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:51,980 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:52,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:52,193 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:52,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-04-15 02:26:52,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:52,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898820483] [2021-04-15 02:26:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:52,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898820483] [2021-04-15 02:26:52,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66990041] [2021-04-15 02:26:52,233 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 [2021-04-15 02:26:52,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:26:52,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:52,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:52,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450423094] [2021-04-15 02:26:52,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:52,277 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:52,357 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-04-15 02:26:52,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:52,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:52,358 INFO L225 Difference]: With dead ends: 229 [2021-04-15 02:26:52,358 INFO L226 Difference]: Without dead ends: 228 [2021-04-15 02:26:52,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-04-15 02:26:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-04-15 02:26:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-04-15 02:26:52,363 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-04-15 02:26:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:52,363 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-04-15 02:26:52,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-04-15 02:26:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:52,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:52,364 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:52,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:52,577 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-04-15 02:26:52,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:52,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587600113] [2021-04-15 02:26:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:52,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587600113] [2021-04-15 02:26:52,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218837845] [2021-04-15 02:26:52,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:52,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:52,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:52,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498999097] [2021-04-15 02:26:52,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:52,664 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:52,701 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-04-15 02:26:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:26:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:52,702 INFO L225 Difference]: With dead ends: 244 [2021-04-15 02:26:52,702 INFO L226 Difference]: Without dead ends: 244 [2021-04-15 02:26:52,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-04-15 02:26:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-04-15 02:26:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-04-15 02:26:52,705 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-04-15 02:26:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:52,705 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-04-15 02:26:52,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-04-15 02:26:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:52,706 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:52,706 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:52,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-04-15 02:26:52,926 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-04-15 02:26:52,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020939334] [2021-04-15 02:26:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:52,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020939334] [2021-04-15 02:26:52,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564370889] [2021-04-15 02:26:52,964 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 [2021-04-15 02:26:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:52,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:53,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:53,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375383163] [2021-04-15 02:26:53,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:53,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:53,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:53,021 INFO L87 Difference]: Start difference. First operand 155 states and 443 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) [2021-04-15 02:26:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:53,115 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-04-15 02:26:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:53,115 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 16 [2021-04-15 02:26:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:53,116 INFO L225 Difference]: With dead ends: 234 [2021-04-15 02:26:53,116 INFO L226 Difference]: Without dead ends: 232 [2021-04-15 02:26:53,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-04-15 02:26:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-04-15 02:26:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-04-15 02:26:53,120 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-04-15 02:26:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:53,120 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-04-15 02:26:53,121 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) [2021-04-15 02:26:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-04-15 02:26:53,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:53,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:53,121 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:53,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 02:26:53,338 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-04-15 02:26:53,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:53,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921977807] [2021-04-15 02:26:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:53,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921977807] [2021-04-15 02:26:53,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830591280] [2021-04-15 02:26:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:26:53,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:53,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:53,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:53,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37936652] [2021-04-15 02:26:53,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:53,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:53,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:53,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:53,439 INFO L87 Difference]: Start difference. First operand 155 states and 442 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) [2021-04-15 02:26:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:53,511 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-04-15 02:26:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:53,512 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 16 [2021-04-15 02:26:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:53,513 INFO L225 Difference]: With dead ends: 257 [2021-04-15 02:26:53,513 INFO L226 Difference]: Without dead ends: 257 [2021-04-15 02:26:53,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-04-15 02:26:53,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-04-15 02:26:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-04-15 02:26:53,517 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-04-15 02:26:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:53,517 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-04-15 02:26:53,517 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) [2021-04-15 02:26:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-04-15 02:26:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:53,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:53,517 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:53,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-04-15 02:26:53,732 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-04-15 02:26:53,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:53,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306791730] [2021-04-15 02:26:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:53,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306791730] [2021-04-15 02:26:53,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080719897] [2021-04-15 02:26:53,775 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 [2021-04-15 02:26:53,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:53,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:26:53,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:53,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:53,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-04-15 02:26:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712058852] [2021-04-15 02:26:53,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:26:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:26:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:53,869 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:54,142 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-04-15 02:26:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:26:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:54,143 INFO L225 Difference]: With dead ends: 265 [2021-04-15 02:26:54,143 INFO L226 Difference]: Without dead ends: 262 [2021-04-15 02:26:54,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:26:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-04-15 02:26:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-04-15 02:26:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-04-15 02:26:54,147 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-04-15 02:26:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:54,147 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-04-15 02:26:54,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-04-15 02:26:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:54,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:54,148 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:54,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:54,361 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-04-15 02:26:54,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:54,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301685936] [2021-04-15 02:26:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:54,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301685936] [2021-04-15 02:26:54,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35721227] [2021-04-15 02:26:54,396 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 [2021-04-15 02:26:54,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:54,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:54,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:54,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:54,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866317517] [2021-04-15 02:26:54,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:54,461 INFO L87 Difference]: Start difference. First operand 202 states and 567 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) [2021-04-15 02:26:54,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:54,536 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-04-15 02:26:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:26:54,537 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 16 [2021-04-15 02:26:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:54,538 INFO L225 Difference]: With dead ends: 353 [2021-04-15 02:26:54,538 INFO L226 Difference]: Without dead ends: 353 [2021-04-15 02:26:54,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:26:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-04-15 02:26:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-04-15 02:26:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-04-15 02:26:54,544 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-04-15 02:26:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:54,544 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-04-15 02:26:54,544 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) [2021-04-15 02:26:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-04-15 02:26:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:54,544 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:54,544 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:54,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-04-15 02:26:54,760 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-04-15 02:26:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:54,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656020538] [2021-04-15 02:26:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:54,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656020538] [2021-04-15 02:26:54,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667018001] [2021-04-15 02:26:54,799 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 [2021-04-15 02:26:54,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:26:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:54,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:54,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:54,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825856706] [2021-04-15 02:26:54,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:54,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:54,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:54,870 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:54,961 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-04-15 02:26:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:54,963 INFO L225 Difference]: With dead ends: 342 [2021-04-15 02:26:54,963 INFO L226 Difference]: Without dead ends: 340 [2021-04-15 02:26:54,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-04-15 02:26:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-04-15 02:26:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-04-15 02:26:54,969 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-04-15 02:26:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:54,969 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-04-15 02:26:54,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-04-15 02:26:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:54,970 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:54,970 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:55,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:55,180 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-04-15 02:26:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:55,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790557565] [2021-04-15 02:26:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790557565] [2021-04-15 02:26:55,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603314361] [2021-04-15 02:26:55,221 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 [2021-04-15 02:26:55,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:55,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:55,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634703359] [2021-04-15 02:26:55,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:55,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:55,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:55,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:55,266 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:55,303 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-04-15 02:26:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:26:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:55,304 INFO L225 Difference]: With dead ends: 348 [2021-04-15 02:26:55,304 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 02:26:55,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 02:26:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-04-15 02:26:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-04-15 02:26:55,308 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-04-15 02:26:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:55,309 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-04-15 02:26:55,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-04-15 02:26:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:55,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:55,309 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:55,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:55,524 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-04-15 02:26:55,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:55,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524897748] [2021-04-15 02:26:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524897748] [2021-04-15 02:26:55,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543498444] [2021-04-15 02:26:55,557 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 [2021-04-15 02:26:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:55,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:55,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:55,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262182897] [2021-04-15 02:26:55,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:55,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:55,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:55,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:55,624 INFO L87 Difference]: Start difference. First operand 239 states and 693 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) [2021-04-15 02:26:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:55,690 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-04-15 02:26:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:55,691 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 16 [2021-04-15 02:26:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:55,692 INFO L225 Difference]: With dead ends: 362 [2021-04-15 02:26:55,692 INFO L226 Difference]: Without dead ends: 362 [2021-04-15 02:26:55,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-04-15 02:26:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-04-15 02:26:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-04-15 02:26:55,696 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-04-15 02:26:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:55,696 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-04-15 02:26:55,696 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) [2021-04-15 02:26:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-04-15 02:26:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:55,697 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:55,697 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:55,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-04-15 02:26:55,909 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-04-15 02:26:55,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:55,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914274880] [2021-04-15 02:26:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:55,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914274880] [2021-04-15 02:26:55,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851783854] [2021-04-15 02:26:55,940 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 [2021-04-15 02:26:55,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:55,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:56,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:56,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133713421] [2021-04-15 02:26:56,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:56,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:56,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:56,005 INFO L87 Difference]: Start difference. First operand 239 states and 693 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) [2021-04-15 02:26:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:56,078 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-04-15 02:26:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:56,078 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 16 [2021-04-15 02:26:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:56,079 INFO L225 Difference]: With dead ends: 346 [2021-04-15 02:26:56,079 INFO L226 Difference]: Without dead ends: 346 [2021-04-15 02:26:56,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-04-15 02:26:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-04-15 02:26:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-04-15 02:26:56,083 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-04-15 02:26:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:56,083 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-04-15 02:26:56,084 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) [2021-04-15 02:26:56,084 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-04-15 02:26:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:56,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:56,084 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:56,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:56,300 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:56,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:56,300 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-04-15 02:26:56,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:56,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311576138] [2021-04-15 02:26:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311576138] [2021-04-15 02:26:56,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928822537] [2021-04-15 02:26:56,338 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 [2021-04-15 02:26:56,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:56,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:56,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:56,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:56,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771675984] [2021-04-15 02:26:56,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:56,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:56,391 INFO L87 Difference]: Start difference. First operand 239 states and 693 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) [2021-04-15 02:26:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:56,507 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-04-15 02:26:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:26:56,508 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 16 [2021-04-15 02:26:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:56,509 INFO L225 Difference]: With dead ends: 402 [2021-04-15 02:26:56,509 INFO L226 Difference]: Without dead ends: 402 [2021-04-15 02:26:56,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:26:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-04-15 02:26:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-04-15 02:26:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-04-15 02:26:56,514 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-04-15 02:26:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:56,514 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-04-15 02:26:56,514 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) [2021-04-15 02:26:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-04-15 02:26:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:56,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:56,514 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:56,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-04-15 02:26:56,729 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-04-15 02:26:56,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:56,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196907391] [2021-04-15 02:26:56,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196907391] [2021-04-15 02:26:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825351731] [2021-04-15 02:26:56,762 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 [2021-04-15 02:26:56,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:56,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:56,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:56,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186244005] [2021-04-15 02:26:56,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:56,813 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:56,891 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-04-15 02:26:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:26:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:56,894 INFO L225 Difference]: With dead ends: 396 [2021-04-15 02:26:56,894 INFO L226 Difference]: Without dead ends: 394 [2021-04-15 02:26:56,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:26:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-04-15 02:26:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-04-15 02:26:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-04-15 02:26:56,899 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-04-15 02:26:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:56,899 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-04-15 02:26:56,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-04-15 02:26:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:56,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:56,899 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:57,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-04-15 02:26:57,113 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-04-15 02:26:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:57,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581616361] [2021-04-15 02:26:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581616361] [2021-04-15 02:26:57,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205749863] [2021-04-15 02:26:57,159 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 [2021-04-15 02:26:57,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:26:57,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:57,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:57,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:26:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402852936] [2021-04-15 02:26:57,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:26:57,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:26:57,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:26:57,204 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:57,237 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-04-15 02:26:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:26:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:57,239 INFO L225 Difference]: With dead ends: 394 [2021-04-15 02:26:57,239 INFO L226 Difference]: Without dead ends: 394 [2021-04-15 02:26:57,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-04-15 02:26:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-04-15 02:26:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-04-15 02:26:57,244 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-04-15 02:26:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:57,244 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-04-15 02:26:57,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-04-15 02:26:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:57,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:57,244 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:57,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-04-15 02:26:57,459 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:57,459 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-04-15 02:26:57,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:57,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111423705] [2021-04-15 02:26:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:57,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111423705] [2021-04-15 02:26:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048460407] [2021-04-15 02:26:57,497 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) [2021-04-15 02:26:57,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:26:57,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:57,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:57,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:57,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694168097] [2021-04-15 02:26:57,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:57,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:57,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:57,552 INFO L87 Difference]: Start difference. First operand 290 states and 860 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) [2021-04-15 02:26:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:57,610 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-04-15 02:26:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:57,611 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 16 [2021-04-15 02:26:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:57,612 INFO L225 Difference]: With dead ends: 402 [2021-04-15 02:26:57,612 INFO L226 Difference]: Without dead ends: 402 [2021-04-15 02:26:57,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:26:57,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-04-15 02:26:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-04-15 02:26:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-04-15 02:26:57,616 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-04-15 02:26:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:57,616 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-04-15 02:26:57,616 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) [2021-04-15 02:26:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-04-15 02:26:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:57,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:57,617 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:57,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-04-15 02:26:57,832 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-04-15 02:26:57,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:57,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301148285] [2021-04-15 02:26:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301148285] [2021-04-15 02:26:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162482400] [2021-04-15 02:26:57,866 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 [2021-04-15 02:26:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:57,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:57,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:57,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769186137] [2021-04-15 02:26:57,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:57,933 INFO L87 Difference]: Start difference. First operand 286 states and 846 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) [2021-04-15 02:26:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:57,996 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-04-15 02:26:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:26:57,996 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 16 [2021-04-15 02:26:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:57,997 INFO L225 Difference]: With dead ends: 379 [2021-04-15 02:26:57,997 INFO L226 Difference]: Without dead ends: 379 [2021-04-15 02:26:57,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-04-15 02:26:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-04-15 02:26:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-04-15 02:26:58,002 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-04-15 02:26:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:58,002 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-04-15 02:26:58,002 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) [2021-04-15 02:26:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-04-15 02:26:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:58,002 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:58,002 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:58,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:58,217 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-04-15 02:26:58,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:58,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059895558] [2021-04-15 02:26:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:58,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059895558] [2021-04-15 02:26:58,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586659466] [2021-04-15 02:26:58,252 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 [2021-04-15 02:26:58,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:26:58,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:58,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:58,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:58,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520843035] [2021-04-15 02:26:58,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:58,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:58,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:58,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:58,304 INFO L87 Difference]: Start difference. First operand 286 states and 846 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) [2021-04-15 02:26:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:58,398 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-04-15 02:26:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:26:58,399 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 16 [2021-04-15 02:26:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:58,400 INFO L225 Difference]: With dead ends: 381 [2021-04-15 02:26:58,400 INFO L226 Difference]: Without dead ends: 381 [2021-04-15 02:26:58,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:26:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-04-15 02:26:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-04-15 02:26:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-04-15 02:26:58,404 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-04-15 02:26:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:58,404 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-04-15 02:26:58,404 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) [2021-04-15 02:26:58,404 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-04-15 02:26:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:58,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:58,405 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:58,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:58,617 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-04-15 02:26:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:58,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301826192] [2021-04-15 02:26:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:58,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301826192] [2021-04-15 02:26:58,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157250972] [2021-04-15 02:26:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:26:58,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:26:58,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:58,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:58,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:58,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 02:26:58,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846356719] [2021-04-15 02:26:58,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:58,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:58,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:58,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:58,699 INFO L87 Difference]: Start difference. First operand 286 states and 846 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) [2021-04-15 02:26:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:58,835 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-04-15 02:26:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:26:58,835 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 16 [2021-04-15 02:26:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:58,836 INFO L225 Difference]: With dead ends: 438 [2021-04-15 02:26:58,837 INFO L226 Difference]: Without dead ends: 438 [2021-04-15 02:26:58,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:26:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-04-15 02:26:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-04-15 02:26:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-04-15 02:26:58,841 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-04-15 02:26:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:58,841 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-04-15 02:26:58,841 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) [2021-04-15 02:26:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-04-15 02:26:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:58,841 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:58,842 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:59,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:59,049 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-04-15 02:26:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:59,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681097197] [2021-04-15 02:26:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681097197] [2021-04-15 02:26:59,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543084485] [2021-04-15 02:26:59,105 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 [2021-04-15 02:26:59,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:26:59,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:59,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:59,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:59,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:26:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835702320] [2021-04-15 02:26:59,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:59,168 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:59,292 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-04-15 02:26:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:26:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:59,294 INFO L225 Difference]: With dead ends: 446 [2021-04-15 02:26:59,294 INFO L226 Difference]: Without dead ends: 444 [2021-04-15 02:26:59,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:26:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-04-15 02:26:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-04-15 02:26:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-04-15 02:26:59,299 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-04-15 02:26:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:59,299 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-04-15 02:26:59,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-04-15 02:26:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:59,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:59,300 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:59,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-04-15 02:26:59,513 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-04-15 02:26:59,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:59,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548266564] [2021-04-15 02:26:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548266564] [2021-04-15 02:26:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643728258] [2021-04-15 02:26:59,552 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 [2021-04-15 02:26:59,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:26:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:26:59,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:59,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:26:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121684569] [2021-04-15 02:26:59,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:26:59,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:59,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:26:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:26:59,599 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:26:59,662 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-04-15 02:26:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:26:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:26:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:26:59,664 INFO L225 Difference]: With dead ends: 432 [2021-04-15 02:26:59,664 INFO L226 Difference]: Without dead ends: 432 [2021-04-15 02:26:59,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:26:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-04-15 02:26:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-04-15 02:26:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-04-15 02:26:59,668 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-04-15 02:26:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:26:59,668 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-04-15 02:26:59,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:26:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-04-15 02:26:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:26:59,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:26:59,669 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:26:59,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:26:59,879 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:26:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:26:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-04-15 02:26:59,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:26:59,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818154912] [2021-04-15 02:26:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:26:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:26:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818154912] [2021-04-15 02:26:59,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492203381] [2021-04-15 02:26:59,917 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 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 [2021-04-15 02:26:59,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:26:59,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:26:59,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:26:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:26:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:26:59,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:26:59,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 02:26:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344715100] [2021-04-15 02:26:59,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:26:59,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:26:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:26:59,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:26:59,981 INFO L87 Difference]: Start difference. First operand 342 states and 1018 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) [2021-04-15 02:27:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:00,089 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-04-15 02:27:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:27:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:27:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:00,091 INFO L225 Difference]: With dead ends: 438 [2021-04-15 02:27:00,091 INFO L226 Difference]: Without dead ends: 438 [2021-04-15 02:27:00,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-04-15 02:27:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-04-15 02:27:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-04-15 02:27:00,095 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-04-15 02:27:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:00,095 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-04-15 02:27:00,096 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) [2021-04-15 02:27:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-04-15 02:27:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:27:00,096 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:00,096 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:00,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:00,309 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:00,309 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-04-15 02:27:00,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:00,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36259221] [2021-04-15 02:27:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:00,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36259221] [2021-04-15 02:27:00,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118329931] [2021-04-15 02:27:00,349 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 [2021-04-15 02:27:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:00,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:00,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 02:27:00,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840250755] [2021-04-15 02:27:00,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:00,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:00,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:00,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:00,404 INFO L87 Difference]: Start difference. First operand 338 states and 1004 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) [2021-04-15 02:27:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:00,538 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-04-15 02:27:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:27:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:27:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:00,539 INFO L225 Difference]: With dead ends: 417 [2021-04-15 02:27:00,539 INFO L226 Difference]: Without dead ends: 417 [2021-04-15 02:27:00,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:27:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-04-15 02:27:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-04-15 02:27:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-04-15 02:27:00,543 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-04-15 02:27:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:00,544 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-04-15 02:27:00,544 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) [2021-04-15 02:27:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-04-15 02:27:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:27:00,544 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:00,544 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:00,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:00,759 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-04-15 02:27:00,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:00,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588056193] [2021-04-15 02:27:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588056193] [2021-04-15 02:27:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201072661] [2021-04-15 02:27:00,799 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 [2021-04-15 02:27:00,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:00,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:00,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 02:27:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208652459] [2021-04-15 02:27:00,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:00,866 INFO L87 Difference]: Start difference. First operand 332 states and 984 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) [2021-04-15 02:27:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:01,002 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-04-15 02:27:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:27:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:27:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:01,004 INFO L225 Difference]: With dead ends: 404 [2021-04-15 02:27:01,004 INFO L226 Difference]: Without dead ends: 404 [2021-04-15 02:27:01,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:27:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-04-15 02:27:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-04-15 02:27:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-04-15 02:27:01,008 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-04-15 02:27:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:01,008 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-04-15 02:27:01,008 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) [2021-04-15 02:27:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-04-15 02:27:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:27:01,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:01,009 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:01,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:01,224 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-04-15 02:27:01,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:01,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489162762] [2021-04-15 02:27:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:01,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489162762] [2021-04-15 02:27:01,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318808717] [2021-04-15 02:27:01,266 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) [2021-04-15 02:27:01,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:27:01,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:01,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 02:27:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801677823] [2021-04-15 02:27:01,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:01,330 INFO L87 Difference]: Start difference. First operand 325 states and 962 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) [2021-04-15 02:27:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:01,446 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-04-15 02:27:01,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:27:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:27:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:01,447 INFO L225 Difference]: With dead ends: 408 [2021-04-15 02:27:01,447 INFO L226 Difference]: Without dead ends: 408 [2021-04-15 02:27:01,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:27:01,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-04-15 02:27:01,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-04-15 02:27:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-04-15 02:27:01,451 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-04-15 02:27:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:01,451 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-04-15 02:27:01,451 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) [2021-04-15 02:27:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-04-15 02:27:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:27:01,452 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:01,452 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:01,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-04-15 02:27:01,653 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-04-15 02:27:01,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:01,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028041208] [2021-04-15 02:27:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028041208] [2021-04-15 02:27:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9270330] [2021-04-15 02:27:01,698 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 [2021-04-15 02:27:01,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:01,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:01,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 02:27:01,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201563447] [2021-04-15 02:27:01,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:01,759 INFO L87 Difference]: Start difference. First operand 320 states and 946 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) [2021-04-15 02:27:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:01,923 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-04-15 02:27:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:27:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 02:27:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:01,925 INFO L225 Difference]: With dead ends: 465 [2021-04-15 02:27:01,925 INFO L226 Difference]: Without dead ends: 465 [2021-04-15 02:27:01,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:27:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-04-15 02:27:01,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-04-15 02:27:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-04-15 02:27:01,932 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-04-15 02:27:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:01,932 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-04-15 02:27:01,933 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) [2021-04-15 02:27:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-04-15 02:27:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:01,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:01,933 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:02,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:02,145 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-04-15 02:27:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:02,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80642746] [2021-04-15 02:27:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80642746] [2021-04-15 02:27:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102186585] [2021-04-15 02:27:02,177 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 [2021-04-15 02:27:02,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:27:02,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:02,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:02,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:27:02,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615994399] [2021-04-15 02:27:02,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:27:02,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:27:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:27:02,230 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:02,270 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-04-15 02:27:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:27:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:27:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:02,272 INFO L225 Difference]: With dead ends: 414 [2021-04-15 02:27:02,272 INFO L226 Difference]: Without dead ends: 414 [2021-04-15 02:27:02,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-04-15 02:27:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-04-15 02:27:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-04-15 02:27:02,276 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-04-15 02:27:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:02,277 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-04-15 02:27:02,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-04-15 02:27:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:02,277 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:02,277 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:02,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-04-15 02:27:02,492 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-04-15 02:27:02,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:02,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517392056] [2021-04-15 02:27:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517392056] [2021-04-15 02:27:02,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081792990] [2021-04-15 02:27:02,535 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 [2021-04-15 02:27:02,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:27:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:02,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:02,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 02:27:02,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472519055] [2021-04-15 02:27:02,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:27:02,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:27:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:27:02,588 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:02,677 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-04-15 02:27:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:27:02,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:27:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:02,679 INFO L225 Difference]: With dead ends: 409 [2021-04-15 02:27:02,679 INFO L226 Difference]: Without dead ends: 407 [2021-04-15 02:27:02,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-04-15 02:27:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-04-15 02:27:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-04-15 02:27:02,683 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-04-15 02:27:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:02,683 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-04-15 02:27:02,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-04-15 02:27:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:02,684 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:02,684 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:02,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-04-15 02:27:02,897 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-04-15 02:27:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752659884] [2021-04-15 02:27:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:02,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752659884] [2021-04-15 02:27:02,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136891956] [2021-04-15 02:27:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:27:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:02,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:02,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532006574] [2021-04-15 02:27:02,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:02,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:02,989 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:03,078 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-04-15 02:27:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:03,088 INFO L225 Difference]: With dead ends: 414 [2021-04-15 02:27:03,088 INFO L226 Difference]: Without dead ends: 411 [2021-04-15 02:27:03,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:27:03,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-04-15 02:27:03,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-04-15 02:27:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-04-15 02:27:03,093 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-04-15 02:27:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:03,093 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-04-15 02:27:03,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-04-15 02:27:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:03,093 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:03,093 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:03,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:03,308 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:03,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-04-15 02:27:03,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:03,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949855161] [2021-04-15 02:27:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949855161] [2021-04-15 02:27:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909322902] [2021-04-15 02:27:03,349 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 [2021-04-15 02:27:03,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:03,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:03,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625195832] [2021-04-15 02:27:03,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:03,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:03,405 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:03,487 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-04-15 02:27:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:27:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:03,489 INFO L225 Difference]: With dead ends: 367 [2021-04-15 02:27:03,489 INFO L226 Difference]: Without dead ends: 364 [2021-04-15 02:27:03,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-04-15 02:27:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-04-15 02:27:03,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 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) [2021-04-15 02:27:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-04-15 02:27:03,493 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-04-15 02:27:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:03,493 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-04-15 02:27:03,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-04-15 02:27:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:03,493 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:03,493 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:03,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-04-15 02:27:03,694 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:03,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-04-15 02:27:03,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:03,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624971855] [2021-04-15 02:27:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:03,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624971855] [2021-04-15 02:27:03,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482248021] [2021-04-15 02:27:03,738 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 [2021-04-15 02:27:03,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:27:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:03,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:27:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:03,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:27:03,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401291435] [2021-04-15 02:27:03,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:03,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:03,792 INFO L87 Difference]: Start difference. First operand 323 states and 961 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) [2021-04-15 02:27:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:03,861 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-04-15 02:27:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:27:03,861 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 17 [2021-04-15 02:27:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:03,863 INFO L225 Difference]: With dead ends: 355 [2021-04-15 02:27:03,863 INFO L226 Difference]: Without dead ends: 351 [2021-04-15 02:27:03,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-04-15 02:27:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-04-15 02:27:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-04-15 02:27:03,866 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-04-15 02:27:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:03,866 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-04-15 02:27:03,866 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) [2021-04-15 02:27:03,866 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-04-15 02:27:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:03,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:03,867 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:04,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-04-15 02:27:04,081 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:04,082 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-04-15 02:27:04,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:04,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008222521] [2021-04-15 02:27:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008222521] [2021-04-15 02:27:04,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654672168] [2021-04-15 02:27:04,152 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) [2021-04-15 02:27:04,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:27:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:04,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:04,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-04-15 02:27:04,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918937154] [2021-04-15 02:27:04,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:27:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:27:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:27:04,223 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:04,260 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-04-15 02:27:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:27:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:04,261 INFO L225 Difference]: With dead ends: 443 [2021-04-15 02:27:04,261 INFO L226 Difference]: Without dead ends: 443 [2021-04-15 02:27:04,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:27:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-04-15 02:27:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-04-15 02:27:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-04-15 02:27:04,265 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-04-15 02:27:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:04,265 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-04-15 02:27:04,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-04-15 02:27:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:04,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:04,266 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:04,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-04-15 02:27:04,473 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:04,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-04-15 02:27:04,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:04,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182392597] [2021-04-15 02:27:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:04,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182392597] [2021-04-15 02:27:04,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822649355] [2021-04-15 02:27:04,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:27:04,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:27:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:04,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:27:04,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:04,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-04-15 02:27:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029763212] [2021-04-15 02:27:04,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:27:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:04,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:27:04,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:27:04,562 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:04,618 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-04-15 02:27:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:27:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:27:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:04,620 INFO L225 Difference]: With dead ends: 430 [2021-04-15 02:27:04,620 INFO L226 Difference]: Without dead ends: 430 [2021-04-15 02:27:04,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-04-15 02:27:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-04-15 02:27:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-04-15 02:27:04,624 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-04-15 02:27:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:04,624 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-04-15 02:27:04,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-04-15 02:27:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:04,624 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:04,624 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:04,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:04,837 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-04-15 02:27:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:04,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77400254] [2021-04-15 02:27:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77400254] [2021-04-15 02:27:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749107107] [2021-04-15 02:27:04,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:04,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:27:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:04,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:04,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:04,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 02:27:04,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189241215] [2021-04-15 02:27:04,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:27:04,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:04,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:27:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:27:04,924 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:05,020 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-04-15 02:27:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:27:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:27:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:05,021 INFO L225 Difference]: With dead ends: 428 [2021-04-15 02:27:05,022 INFO L226 Difference]: Without dead ends: 426 [2021-04-15 02:27:05,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-04-15 02:27:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-04-15 02:27:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-04-15 02:27:05,026 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-04-15 02:27:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:05,026 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-04-15 02:27:05,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-04-15 02:27:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:05,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:05,027 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:05,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:05,245 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-04-15 02:27:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:05,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374168129] [2021-04-15 02:27:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374168129] [2021-04-15 02:27:05,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285952247] [2021-04-15 02:27:05,285 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 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 [2021-04-15 02:27:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:05,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:05,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:05,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605313664] [2021-04-15 02:27:05,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:05,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:05,331 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:05,436 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-04-15 02:27:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:05,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:05,438 INFO L225 Difference]: With dead ends: 433 [2021-04-15 02:27:05,438 INFO L226 Difference]: Without dead ends: 430 [2021-04-15 02:27:05,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:27:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-04-15 02:27:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-04-15 02:27:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-04-15 02:27:05,442 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-04-15 02:27:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:05,442 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-04-15 02:27:05,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-04-15 02:27:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:05,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:05,443 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:05,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:05,657 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-04-15 02:27:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:05,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032418441] [2021-04-15 02:27:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:05,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032418441] [2021-04-15 02:27:05,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197979043] [2021-04-15 02:27:05,708 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 [2021-04-15 02:27:05,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:05,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:05,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:05,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:05,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247764140] [2021-04-15 02:27:05,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:05,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:05,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:05,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:05,772 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:05,848 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-04-15 02:27:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:27:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:05,853 INFO L225 Difference]: With dead ends: 386 [2021-04-15 02:27:05,853 INFO L226 Difference]: Without dead ends: 383 [2021-04-15 02:27:05,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:05,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-04-15 02:27:05,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-04-15 02:27:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-04-15 02:27:05,857 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-04-15 02:27:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:05,857 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-04-15 02:27:05,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-04-15 02:27:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:05,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:05,857 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:06,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:06,069 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-04-15 02:27:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:06,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035450869] [2021-04-15 02:27:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035450869] [2021-04-15 02:27:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029600586] [2021-04-15 02:27:06,111 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 [2021-04-15 02:27:06,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:27:06,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:27:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:06,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:06,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-04-15 02:27:06,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634667841] [2021-04-15 02:27:06,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:06,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:06,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:06,178 INFO L87 Difference]: Start difference. First operand 329 states and 977 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) [2021-04-15 02:27:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:06,256 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-04-15 02:27:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:27:06,257 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 17 [2021-04-15 02:27:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:06,258 INFO L225 Difference]: With dead ends: 385 [2021-04-15 02:27:06,258 INFO L226 Difference]: Without dead ends: 381 [2021-04-15 02:27:06,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:06,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-04-15 02:27:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-04-15 02:27:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-04-15 02:27:06,262 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-04-15 02:27:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:06,262 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-04-15 02:27:06,262 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) [2021-04-15 02:27:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-04-15 02:27:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:06,262 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:06,262 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:06,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-04-15 02:27:06,473 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-04-15 02:27:06,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:06,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160046844] [2021-04-15 02:27:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:06,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160046844] [2021-04-15 02:27:06,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829214176] [2021-04-15 02:27:06,519 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 [2021-04-15 02:27:06,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:06,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:06,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773187065] [2021-04-15 02:27:06,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:06,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:06,566 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:06,650 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-04-15 02:27:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:27:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:06,651 INFO L225 Difference]: With dead ends: 372 [2021-04-15 02:27:06,651 INFO L226 Difference]: Without dead ends: 367 [2021-04-15 02:27:06,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-04-15 02:27:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-04-15 02:27:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:06,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-04-15 02:27:06,655 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-04-15 02:27:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:06,655 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-04-15 02:27:06,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-04-15 02:27:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:06,656 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:06,656 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:06,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-04-15 02:27:06,871 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-04-15 02:27:06,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:06,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066061606] [2021-04-15 02:27:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:06,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066061606] [2021-04-15 02:27:06,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174904615] [2021-04-15 02:27:06,922 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 [2021-04-15 02:27:06,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:27:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-04-15 02:27:06,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413611530] [2021-04-15 02:27:06,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:06,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:06,976 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:07,036 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-04-15 02:27:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:27:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:07,038 INFO L225 Difference]: With dead ends: 518 [2021-04-15 02:27:07,038 INFO L226 Difference]: Without dead ends: 518 [2021-04-15 02:27:07,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:27:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-04-15 02:27:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-04-15 02:27:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-04-15 02:27:07,042 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-04-15 02:27:07,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:07,042 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-04-15 02:27:07,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,043 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-04-15 02:27:07,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:07,043 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:07,043 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:07,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-04-15 02:27:07,245 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-04-15 02:27:07,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:07,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639181394] [2021-04-15 02:27:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639181394] [2021-04-15 02:27:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179622163] [2021-04-15 02:27:07,292 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 [2021-04-15 02:27:07,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:27:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:27:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:07,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:07,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 02:27:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684539433] [2021-04-15 02:27:07,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:27:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:07,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:27:07,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:27:07,338 INFO L87 Difference]: Start difference. First operand 384 states and 1187 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) [2021-04-15 02:27:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:07,423 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-04-15 02:27:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:07,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:07,424 INFO L225 Difference]: With dead ends: 496 [2021-04-15 02:27:07,424 INFO L226 Difference]: Without dead ends: 494 [2021-04-15 02:27:07,425 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-04-15 02:27:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-04-15 02:27:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-04-15 02:27:07,429 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-04-15 02:27:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:07,429 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-04-15 02:27:07,429 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) [2021-04-15 02:27:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-04-15 02:27:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:07,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:07,430 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:07,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:07,633 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-04-15 02:27:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:07,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8988741] [2021-04-15 02:27:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:07,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8988741] [2021-04-15 02:27:07,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700173701] [2021-04-15 02:27:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:07,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:07,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 02:27:07,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518333853] [2021-04-15 02:27:07,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:07,743 INFO L87 Difference]: Start difference. First operand 384 states and 1185 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) [2021-04-15 02:27:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:07,847 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-04-15 02:27:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:27:07,847 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 17 [2021-04-15 02:27:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:07,848 INFO L225 Difference]: With dead ends: 501 [2021-04-15 02:27:07,848 INFO L226 Difference]: Without dead ends: 498 [2021-04-15 02:27:07,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-04-15 02:27:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-04-15 02:27:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-04-15 02:27:07,853 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-04-15 02:27:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:07,853 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-04-15 02:27:07,853 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) [2021-04-15 02:27:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-04-15 02:27:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:07,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:07,854 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:08,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-04-15 02:27:08,061 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:08,061 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-04-15 02:27:08,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:08,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907463138] [2021-04-15 02:27:08,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907463138] [2021-04-15 02:27:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350279024] [2021-04-15 02:27:08,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:27:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:08,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:08,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:08,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 02:27:08,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959554595] [2021-04-15 02:27:08,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:08,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:08,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:08,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:08,164 INFO L87 Difference]: Start difference. First operand 390 states and 1207 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) [2021-04-15 02:27:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:08,256 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-04-15 02:27:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:27:08,256 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 17 [2021-04-15 02:27:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:08,257 INFO L225 Difference]: With dead ends: 453 [2021-04-15 02:27:08,257 INFO L226 Difference]: Without dead ends: 450 [2021-04-15 02:27:08,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-04-15 02:27:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-04-15 02:27:08,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-04-15 02:27:08,262 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-04-15 02:27:08,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:08,262 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-04-15 02:27:08,262 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) [2021-04-15 02:27:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-04-15 02:27:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:08,262 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:08,262 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:08,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:08,473 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-04-15 02:27:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:08,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693714241] [2021-04-15 02:27:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:08,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693714241] [2021-04-15 02:27:08,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354811604] [2021-04-15 02:27:08,515 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 [2021-04-15 02:27:08,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:27:08,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:27:08,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:08,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:08,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-04-15 02:27:08,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363674650] [2021-04-15 02:27:08,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:08,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:08,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:08,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:08,607 INFO L87 Difference]: Start difference. First operand 390 states and 1206 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) [2021-04-15 02:27:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:08,691 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-04-15 02:27:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:27:08,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:08,692 INFO L225 Difference]: With dead ends: 450 [2021-04-15 02:27:08,692 INFO L226 Difference]: Without dead ends: 446 [2021-04-15 02:27:08,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-04-15 02:27:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-04-15 02:27:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-04-15 02:27:08,697 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-04-15 02:27:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:08,698 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-04-15 02:27:08,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-04-15 02:27:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:08,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:08,698 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:08,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-04-15 02:27:08,909 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-04-15 02:27:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555866643] [2021-04-15 02:27:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:08,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555866643] [2021-04-15 02:27:08,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042999570] [2021-04-15 02:27:08,953 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:08,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:08,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:09,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:09,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 02:27:09,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211478179] [2021-04-15 02:27:09,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:27:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:27:09,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:27:09,007 INFO L87 Difference]: Start difference. First operand 390 states and 1205 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) [2021-04-15 02:27:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:09,088 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-04-15 02:27:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:27:09,088 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 17 [2021-04-15 02:27:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:09,089 INFO L225 Difference]: With dead ends: 444 [2021-04-15 02:27:09,089 INFO L226 Difference]: Without dead ends: 439 [2021-04-15 02:27:09,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-04-15 02:27:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-04-15 02:27:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-04-15 02:27:09,093 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-04-15 02:27:09,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:09,093 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-04-15 02:27:09,093 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) [2021-04-15 02:27:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-04-15 02:27:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:27:09,094 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:09,094 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:09,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-04-15 02:27:09,308 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-04-15 02:27:09,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:09,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537245728] [2021-04-15 02:27:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:09,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537245728] [2021-04-15 02:27:09,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005306060] [2021-04-15 02:27:09,364 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 [2021-04-15 02:27:09,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:27:09,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 02:27:09,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:09,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:09,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 02:27:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664264270] [2021-04-15 02:27:09,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:27:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:27:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:27:09,425 INFO L87 Difference]: Start difference. First operand 390 states and 1204 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) [2021-04-15 02:27:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:09,511 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-04-15 02:27:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:27:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:27:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:09,512 INFO L225 Difference]: With dead ends: 435 [2021-04-15 02:27:09,512 INFO L226 Difference]: Without dead ends: 429 [2021-04-15 02:27:09,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:27:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-04-15 02:27:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-04-15 02:27:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-04-15 02:27:09,517 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-04-15 02:27:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:09,517 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-04-15 02:27:09,517 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) [2021-04-15 02:27:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-04-15 02:27:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:27:09,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:09,517 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:09,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:09,718 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-04-15 02:27:09,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:09,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41157634] [2021-04-15 02:27:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:09,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41157634] [2021-04-15 02:27:09,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826008679] [2021-04-15 02:27:09,812 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 [2021-04-15 02:27:09,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:27:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:09,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:09,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 02:27:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400373962] [2021-04-15 02:27:09,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:27:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:27:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:27:09,910 INFO L87 Difference]: Start difference. First operand 390 states and 1203 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) [2021-04-15 02:27:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:10,001 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-04-15 02:27:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:27:10,001 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 [2021-04-15 02:27:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:10,002 INFO L225 Difference]: With dead ends: 721 [2021-04-15 02:27:10,003 INFO L226 Difference]: Without dead ends: 721 [2021-04-15 02:27:10,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:27:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-04-15 02:27:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-04-15 02:27:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-04-15 02:27:10,008 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-04-15 02:27:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:10,008 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-04-15 02:27:10,009 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) [2021-04-15 02:27:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-04-15 02:27:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:27:10,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:10,009 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:10,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:10,210 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:10,210 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-04-15 02:27:10,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:10,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270965173] [2021-04-15 02:27:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:10,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270965173] [2021-04-15 02:27:10,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583345944] [2021-04-15 02:27:10,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:10,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:27:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:10,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:10,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 02:27:10,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063020167] [2021-04-15 02:27:10,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:27:10,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:10,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:27:10,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:10,448 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:10,545 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-04-15 02:27:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:27:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 02:27:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:10,546 INFO L225 Difference]: With dead ends: 819 [2021-04-15 02:27:10,546 INFO L226 Difference]: Without dead ends: 819 [2021-04-15 02:27:10,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:27:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-04-15 02:27:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-04-15 02:27:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-04-15 02:27:10,553 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-04-15 02:27:10,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:10,553 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-04-15 02:27:10,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-04-15 02:27:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:27:10,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:10,554 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:10,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-04-15 02:27:10,763 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-04-15 02:27:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:10,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181769239] [2021-04-15 02:27:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181769239] [2021-04-15 02:27:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655921658] [2021-04-15 02:27:10,860 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 [2021-04-15 02:27:10,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:27:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:27:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:27:10,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:10,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-04-15 02:27:10,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770565660] [2021-04-15 02:27:10,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:27:10,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:27:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:27:10,991 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:11,148 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-04-15 02:27:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:27:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:27:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:11,149 INFO L225 Difference]: With dead ends: 928 [2021-04-15 02:27:11,149 INFO L226 Difference]: Without dead ends: 927 [2021-04-15 02:27:11,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:27:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-04-15 02:27:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-04-15 02:27:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-04-15 02:27:11,157 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-04-15 02:27:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:11,157 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-04-15 02:27:11,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-04-15 02:27:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:27:11,158 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:11,158 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:11,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-04-15 02:27:11,360 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:11,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-04-15 02:27:11,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:11,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448839638] [2021-04-15 02:27:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:11,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448839638] [2021-04-15 02:27:11,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494277292] [2021-04-15 02:27:11,434 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 [2021-04-15 02:27:11,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:27:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 02:27:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:11,879 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:27:11,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:27:15,374 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 978 DAG size of output: 806 [2021-04-15 02:27:17,463 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 1649 DAG size of output: 1266 [2021-04-15 02:27:21,211 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1349 [2021-04-15 02:27:21,427 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 1456 [2021-04-15 02:27:21,896 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 2941 DAG size of output: 2181 [2021-04-15 02:27:22,367 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 3088 DAG size of output: 2279 [2021-04-15 02:27:22,868 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 3292 DAG size of output: 2454 [2021-04-15 02:27:23,456 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 3585 DAG size of output: 2698 [2021-04-15 02:27:24,047 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 3585 DAG size of output: 2698 [2021-04-15 02:27:24,625 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 3596 DAG size of output: 2709 [2021-04-15 02:27:24,996 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 2705 DAG size of output: 2633 [2021-04-15 02:27:25,483 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 2635 DAG size of output: 3000 [2021-04-15 02:27:25,743 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 1813 [2021-04-15 02:27:26,385 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1889 [2021-04-15 02:27:26,580 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 1527 [2021-04-15 02:27:26,859 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 1467 DAG size of output: 1622 [2021-04-15 02:27:26,985 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1125 DAG size of output: 1120 [2021-04-15 02:27:27,131 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 1087 [2021-04-15 02:27:28,898 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1446 DAG size of output: 996 [2021-04-15 02:27:29,043 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1473 DAG size of output: 1022 [2021-04-15 02:27:31,235 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 2348 DAG size of output: 1371 [2021-04-15 02:27:31,495 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 2424 DAG size of output: 1416 [2021-04-15 02:27:31,773 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 838 [2021-04-15 02:27:33,888 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 3137 DAG size of output: 1632 [2021-04-15 02:27:34,246 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 3506 DAG size of output: 1830 [2021-04-15 02:27:34,377 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 1212 [2021-04-15 02:27:34,587 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1064 DAG size of output: 1236 [2021-04-15 02:27:35,744 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 1017 [2021-04-15 02:27:37,757 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1273 DAG size of output: 732 [2021-04-15 02:27:37,893 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1758 DAG size of output: 848 [2021-04-15 02:27:38,045 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1940 DAG size of output: 972 [2021-04-15 02:27:38,539 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 5222 DAG size of output: 2568 [2021-04-15 02:27:39,026 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 5222 DAG size of output: 2568 [2021-04-15 02:27:39,831 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 5229 DAG size of output: 2930 [2021-04-15 02:27:40,028 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 2001 DAG size of output: 1359 [2021-04-15 02:27:40,161 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1121 DAG size of output: 831 [2021-04-15 02:27:40,965 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1231 DAG size of output: 764 [2021-04-15 02:27:41,744 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1668 DAG size of output: 873 [2021-04-15 02:27:41,871 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1668 DAG size of output: 873 [2021-04-15 02:27:42,018 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1674 DAG size of output: 879 [2021-04-15 02:27:42,206 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 829 DAG size of output: 893 [2021-04-15 02:27:43,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:27:43,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:43,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:27:43,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:27:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:43,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:43,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:27:43,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900857274] [2021-04-15 02:27:43,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:27:43,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:43,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:27:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:43,045 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:43,272 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-04-15 02:27:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:27:43,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:27:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:43,274 INFO L225 Difference]: With dead ends: 848 [2021-04-15 02:27:43,274 INFO L226 Difference]: Without dead ends: 845 [2021-04-15 02:27:43,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-04-15 02:27:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-04-15 02:27:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-04-15 02:27:43,283 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-04-15 02:27:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:43,283 INFO L480 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-04-15 02:27:43,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-04-15 02:27:43,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:27:43,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:43,284 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:43,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-04-15 02:27:43,486 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-04-15 02:27:43,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:43,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725808043] [2021-04-15 02:27:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:43,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725808043] [2021-04-15 02:27:43,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376029823] [2021-04-15 02:27:43,555 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 [2021-04-15 02:27:43,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:27:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:43,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:27:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:43,969 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:27:43,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:43,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:27:47,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:27:47,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:47,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:27:47,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:27:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:47,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:47,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:27:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665496079] [2021-04-15 02:27:47,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:27:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:27:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:47,736 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:48,033 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-04-15 02:27:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:27:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:27:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:48,035 INFO L225 Difference]: With dead ends: 961 [2021-04-15 02:27:48,035 INFO L226 Difference]: Without dead ends: 958 [2021-04-15 02:27:48,035 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-04-15 02:27:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-04-15 02:27:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-04-15 02:27:48,044 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-04-15 02:27:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:48,044 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-04-15 02:27:48,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-04-15 02:27:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:27:48,045 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:48,045 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:48,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:48,249 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-04-15 02:27:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:48,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220147748] [2021-04-15 02:27:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220147748] [2021-04-15 02:27:48,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408799992] [2021-04-15 02:27:48,328 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 [2021-04-15 02:27:48,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:27:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:27:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:48,708 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:27:48,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:48,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:27:51,201 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1243 DAG size of output: 825 [2021-04-15 02:27:52,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:27:52,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:52,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:27:52,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:27:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:52,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:52,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:27:52,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920878241] [2021-04-15 02:27:52,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:27:52,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:27:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:52,576 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:52,864 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-04-15 02:27:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:27:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:27:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:52,866 INFO L225 Difference]: With dead ends: 1077 [2021-04-15 02:27:52,866 INFO L226 Difference]: Without dead ends: 1074 [2021-04-15 02:27:52,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-04-15 02:27:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-04-15 02:27:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-04-15 02:27:52,877 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-04-15 02:27:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:52,877 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-04-15 02:27:52,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-04-15 02:27:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:27:52,878 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:52,878 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:53,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6755,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:53,079 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-04-15 02:27:53,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:53,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932966019] [2021-04-15 02:27:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932966019] [2021-04-15 02:27:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225087373] [2021-04-15 02:27:53,147 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 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 [2021-04-15 02:27:53,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:27:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:27:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:53,537 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:27:53,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:53,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:27:57,600 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1696 DAG size of output: 1321 [2021-04-15 02:27:58,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:27:58,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:58,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:27:58,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:27:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:58,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:58,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:27:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327490159] [2021-04-15 02:27:58,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:27:58,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:27:58,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:58,627 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:58,887 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-04-15 02:27:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:27:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:27:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:58,890 INFO L225 Difference]: With dead ends: 1209 [2021-04-15 02:27:58,890 INFO L226 Difference]: Without dead ends: 1206 [2021-04-15 02:27:58,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:27:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-04-15 02:27:58,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-04-15 02:27:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-04-15 02:27:58,904 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-04-15 02:27:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:58,904 INFO L480 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-04-15 02:27:58,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-04-15 02:27:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:27:58,905 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:58,905 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:59,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7547,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:27:59,121 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-04-15 02:27:59,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:59,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665263533] [2021-04-15 02:27:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665263533] [2021-04-15 02:27:59,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115799055] [2021-04-15 02:27:59,185 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 [2021-04-15 02:27:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:59,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:27:59,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:59,573 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:27:59,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:59,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:28:01,427 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 653 [2021-04-15 02:28:03,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:03,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:03,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:03,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:28:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:03,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:03,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:28:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631403570] [2021-04-15 02:28:03,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:28:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:03,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:28:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:03,604 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:03,889 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-04-15 02:28:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:28:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:03,892 INFO L225 Difference]: With dead ends: 1356 [2021-04-15 02:28:03,892 INFO L226 Difference]: Without dead ends: 1353 [2021-04-15 02:28:03,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:03,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-04-15 02:28:03,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-04-15 02:28:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-04-15 02:28:03,908 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-04-15 02:28:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:03,908 INFO L480 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-04-15 02:28:03,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-04-15 02:28:03,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:28:03,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:03,909 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:04,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9519 [2021-04-15 02:28:04,124 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-04-15 02:28:04,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:04,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073915823] [2021-04-15 02:28:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:28:04,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073915823] [2021-04-15 02:28:04,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708489555] [2021-04-15 02:28:04,191 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 [2021-04-15 02:28:04,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:28:04,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:04,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:28:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:04,603 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:28:04,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:04,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:28:09,591 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1458 DAG size of output: 1102 [2021-04-15 02:28:09,834 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 2432 DAG size of output: 1780 [2021-04-15 02:28:10,083 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2651 DAG size of output: 1861 [2021-04-15 02:28:11,863 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1919 DAG size of output: 1170 [2021-04-15 02:28:13,325 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1042 [2021-04-15 02:28:13,565 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 3005 DAG size of output: 1691 [2021-04-15 02:28:13,992 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1767 [2021-04-15 02:28:14,379 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 5592 DAG size of output: 2288 [2021-04-15 02:28:14,754 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 5592 DAG size of output: 2288 [2021-04-15 02:28:15,159 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 5603 DAG size of output: 2299 [2021-04-15 02:28:15,381 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2295 DAG size of output: 2140 [2021-04-15 02:28:15,693 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2142 DAG size of output: 2377 [2021-04-15 02:28:15,873 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1316 [2021-04-15 02:28:16,482 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 1106 [2021-04-15 02:28:17,228 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1541 DAG size of output: 1180 [2021-04-15 02:28:17,455 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1643 DAG size of output: 1788 [2021-04-15 02:28:18,243 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1332 [2021-04-15 02:28:18,549 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 2764 DAG size of output: 1890 [2021-04-15 02:28:18,840 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 2764 DAG size of output: 1890 [2021-04-15 02:28:19,106 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2773 DAG size of output: 1572 [2021-04-15 02:28:20,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:20,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:20,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:20,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:28:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:20,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:20,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:28:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165173653] [2021-04-15 02:28:20,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:28:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:28:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:20,221 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:20,492 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-04-15 02:28:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:28:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:20,495 INFO L225 Difference]: With dead ends: 1521 [2021-04-15 02:28:20,495 INFO L226 Difference]: Without dead ends: 1518 [2021-04-15 02:28:20,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-04-15 02:28:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-04-15 02:28:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-04-15 02:28:20,512 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-04-15 02:28:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:20,512 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-04-15 02:28:20,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-04-15 02:28:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:28:20,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:20,514 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:20,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10479,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:20,729 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-04-15 02:28:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:20,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338574309] [2021-04-15 02:28:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338574309] [2021-04-15 02:28:20,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126803537] [2021-04-15 02:28:20,796 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 [2021-04-15 02:28:20,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:28:20,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:28:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:21,186 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:28:21,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:21,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:28:25,266 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1265 DAG size of output: 1042 [2021-04-15 02:28:25,438 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1124 [2021-04-15 02:28:25,632 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 1148 [2021-04-15 02:28:29,030 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1490 DAG size of output: 1162 [2021-04-15 02:28:29,247 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1181 [2021-04-15 02:28:29,453 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1695 DAG size of output: 1324 [2021-04-15 02:28:29,860 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 2739 DAG size of output: 2103 [2021-04-15 02:28:30,271 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 2879 DAG size of output: 2212 [2021-04-15 02:28:30,739 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 2364 [2021-04-15 02:28:31,191 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 2364 [2021-04-15 02:28:31,687 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 3156 DAG size of output: 2375 [2021-04-15 02:28:32,144 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 2377 DAG size of output: 3005 [2021-04-15 02:28:32,512 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 2174 DAG size of output: 2299 [2021-04-15 02:28:32,622 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 1155 [2021-04-15 02:28:33,562 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1719 DAG size of output: 1081 [2021-04-15 02:28:33,849 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1742 [2021-04-15 02:28:34,002 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 868 DAG size of output: 1263 [2021-04-15 02:28:34,118 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 855 DAG size of output: 1035 [2021-04-15 02:28:34,643 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1470 DAG size of output: 1080 [2021-04-15 02:28:34,933 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 2578 DAG size of output: 1882 [2021-04-15 02:28:35,332 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 3830 DAG size of output: 2565 [2021-04-15 02:28:35,550 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1082 DAG size of output: 1190 [2021-04-15 02:28:35,788 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 1050 [2021-04-15 02:28:35,971 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 1170 [2021-04-15 02:28:36,742 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 791 [2021-04-15 02:28:37,532 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 2210 DAG size of output: 887 [2021-04-15 02:28:38,042 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 5760 DAG size of output: 2544 [2021-04-15 02:28:38,537 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 5760 DAG size of output: 2544 [2021-04-15 02:28:39,073 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 5765 DAG size of output: 2549 [2021-04-15 02:28:39,302 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2551 DAG size of output: 1598 [2021-04-15 02:28:39,553 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1107 DAG size of output: 1063 [2021-04-15 02:28:40,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:40,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:40,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:40,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:28:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:40,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:40,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:28:40,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849993639] [2021-04-15 02:28:40,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:28:40,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:40,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:28:40,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:40,683 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:40,911 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-04-15 02:28:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:28:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:40,914 INFO L225 Difference]: With dead ends: 1650 [2021-04-15 02:28:40,914 INFO L226 Difference]: Without dead ends: 1647 [2021-04-15 02:28:40,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-04-15 02:28:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-04-15 02:28:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-04-15 02:28:40,933 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-04-15 02:28:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:40,933 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-04-15 02:28:40,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-04-15 02:28:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:28:40,935 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:40,935 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:41,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13220,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:41,147 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-04-15 02:28:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:41,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427813398] [2021-04-15 02:28:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427813398] [2021-04-15 02:28:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986181189] [2021-04-15 02:28:41,216 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 [2021-04-15 02:28:41,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:28:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:41,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:28:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:41,621 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:28:41,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:41,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:28:44,780 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1410 [2021-04-15 02:28:44,983 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1410 [2021-04-15 02:28:45,167 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2101 DAG size of output: 1417 [2021-04-15 02:28:45,301 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1417 DAG size of output: 1352 [2021-04-15 02:28:49,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:49,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:49,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:49,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:28:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:49,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:28:49,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25864933] [2021-04-15 02:28:49,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:28:49,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:49,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:28:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:49,335 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:49,579 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-04-15 02:28:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:28:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:49,582 INFO L225 Difference]: With dead ends: 1787 [2021-04-15 02:28:49,582 INFO L226 Difference]: Without dead ends: 1784 [2021-04-15 02:28:49,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-04-15 02:28:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-04-15 02:28:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-04-15 02:28:49,603 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-04-15 02:28:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:49,603 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-04-15 02:28:49,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-04-15 02:28:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:28:49,605 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:49,605 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:49,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17215 [2021-04-15 02:28:49,820 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-04-15 02:28:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:49,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425842340] [2021-04-15 02:28:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425842340] [2021-04-15 02:28:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867335883] [2021-04-15 02:28:49,886 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 [2021-04-15 02:28:49,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:28:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:28:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:50,291 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:28:50,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:28:52,632 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1415 DAG size of output: 869 [2021-04-15 02:28:55,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:55,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:55,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:55,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:28:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:55,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:55,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:28:55,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666480099] [2021-04-15 02:28:55,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:28:55,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:28:55,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:55,878 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:56,207 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-04-15 02:28:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:28:56,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:28:56,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:56,210 INFO L225 Difference]: With dead ends: 1931 [2021-04-15 02:28:56,210 INFO L226 Difference]: Without dead ends: 1928 [2021-04-15 02:28:56,211 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:28:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-04-15 02:28:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-04-15 02:28:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-04-15 02:28:56,232 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-04-15 02:28:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:56,232 INFO L480 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-04-15 02:28:56,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-04-15 02:28:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:28:56,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:56,234 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:56,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18944,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:56,449 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:56,449 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-04-15 02:28:56,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:56,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158097054] [2021-04-15 02:28:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:56,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158097054] [2021-04-15 02:28:56,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823045042] [2021-04-15 02:28:56,514 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 [2021-04-15 02:28:56,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:28:56,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 02:28:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:56,907 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:28:56,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:56,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:29:00,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:00,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:00,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:00,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:29:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:00,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:00,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:29:00,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110018986] [2021-04-15 02:29:00,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:29:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:29:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:00,610 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:00,900 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-04-15 02:29:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:29:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:00,903 INFO L225 Difference]: With dead ends: 2066 [2021-04-15 02:29:00,903 INFO L226 Difference]: Without dead ends: 2063 [2021-04-15 02:29:00,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-04-15 02:29:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-04-15 02:29:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-04-15 02:29:00,925 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-04-15 02:29:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:00,926 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-04-15 02:29:00,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-04-15 02:29:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:29:00,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:00,928 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:01,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20920,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:01,129 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-04-15 02:29:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441327427] [2021-04-15 02:29:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441327427] [2021-04-15 02:29:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068398114] [2021-04-15 02:29:01,204 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 [2021-04-15 02:29:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 02:29:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:01,596 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-04-15 02:29:01,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:01,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-04-15 02:29:05,448 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1888 DAG size of output: 1020 [2021-04-15 02:29:06,355 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 1172 [2021-04-15 02:29:06,543 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 2303 DAG size of output: 1202 [2021-04-15 02:29:06,731 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2303 DAG size of output: 1202 [2021-04-15 02:29:06,947 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2310 DAG size of output: 1209 [2021-04-15 02:29:07,124 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 1335 [2021-04-15 02:29:08,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:08,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:08,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:08,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-04-15 02:29:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-04-15 02:29:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680513193] [2021-04-15 02:29:08,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 02:29:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 02:29:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:08,616 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:08,955 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-04-15 02:29:08,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:08,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:29:08,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:08,958 INFO L225 Difference]: With dead ends: 2152 [2021-04-15 02:29:08,958 INFO L226 Difference]: Without dead ends: 2149 [2021-04-15 02:29:08,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-04-15 02:29:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-04-15 02:29:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-04-15 02:29:08,983 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-04-15 02:29:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:08,983 INFO L480 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-04-15 02:29:08,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-04-15 02:29:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:08,986 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:08,986 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:09,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22169 [2021-04-15 02:29:09,201 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-04-15 02:29:09,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:09,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341472196] [2021-04-15 02:29:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341472196] [2021-04-15 02:29:09,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499540332] [2021-04-15 02:29:09,284 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 [2021-04-15 02:29:09,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:09,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:09,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:09,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:29:09,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853008311] [2021-04-15 02:29:09,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:09,356 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:09,525 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-04-15 02:29:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:09,528 INFO L225 Difference]: With dead ends: 2169 [2021-04-15 02:29:09,528 INFO L226 Difference]: Without dead ends: 2169 [2021-04-15 02:29:09,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-04-15 02:29:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-04-15 02:29:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-04-15 02:29:09,551 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-04-15 02:29:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:09,551 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-04-15 02:29:09,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-04-15 02:29:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:09,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:09,554 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:09,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24498 [2021-04-15 02:29:09,768 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-04-15 02:29:09,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:09,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363133225] [2021-04-15 02:29:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363133225] [2021-04-15 02:29:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119841646] [2021-04-15 02:29:09,854 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 [2021-04-15 02:29:09,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:09,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:09,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:09,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:29:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134353831] [2021-04-15 02:29:09,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:29:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:29:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:29:09,914 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:10,210 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-04-15 02:29:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:29:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:10,213 INFO L225 Difference]: With dead ends: 2262 [2021-04-15 02:29:10,213 INFO L226 Difference]: Without dead ends: 2255 [2021-04-15 02:29:10,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:29:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-04-15 02:29:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-04-15 02:29:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-04-15 02:29:10,236 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-04-15 02:29:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:10,237 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-04-15 02:29:10,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-04-15 02:29:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:10,239 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:10,239 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:10,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24499 [2021-04-15 02:29:10,453 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:10,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-04-15 02:29:10,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:10,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281964331] [2021-04-15 02:29:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281964331] [2021-04-15 02:29:10,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821039397] [2021-04-15 02:29:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:10,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:10,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:10,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:10,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:10,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738565262] [2021-04-15 02:29:10,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:10,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:10,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:10,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:10,583 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 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) [2021-04-15 02:29:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:10,729 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-04-15 02:29:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:10,729 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 22 [2021-04-15 02:29:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:10,732 INFO L225 Difference]: With dead ends: 2016 [2021-04-15 02:29:10,732 INFO L226 Difference]: Without dead ends: 2015 [2021-04-15 02:29:10,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-04-15 02:29:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-04-15 02:29:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-04-15 02:29:10,753 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-04-15 02:29:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:10,753 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-04-15 02:29:10,753 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) [2021-04-15 02:29:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-04-15 02:29:10,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:10,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:10,756 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:10,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24500 [2021-04-15 02:29:10,956 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-04-15 02:29:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:10,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260882606] [2021-04-15 02:29:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260882606] [2021-04-15 02:29:11,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783009273] [2021-04-15 02:29:11,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:11,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:11,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688740696] [2021-04-15 02:29:11,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:11,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:11,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:11,137 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 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) [2021-04-15 02:29:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:11,206 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-04-15 02:29:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:11,207 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 22 [2021-04-15 02:29:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:11,210 INFO L225 Difference]: With dead ends: 2320 [2021-04-15 02:29:11,210 INFO L226 Difference]: Without dead ends: 2320 [2021-04-15 02:29:11,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-04-15 02:29:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-04-15 02:29:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-04-15 02:29:11,233 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-04-15 02:29:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:11,233 INFO L480 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-04-15 02:29:11,233 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) [2021-04-15 02:29:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-04-15 02:29:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:11,236 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:11,236 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:11,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24501 [2021-04-15 02:29:11,436 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:11,437 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-04-15 02:29:11,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:11,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15452176] [2021-04-15 02:29:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15452176] [2021-04-15 02:29:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250449967] [2021-04-15 02:29:11,502 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 [2021-04-15 02:29:11,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:11,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:11,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:11,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202371316] [2021-04-15 02:29:11,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:11,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:11,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:11,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:11,564 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 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) [2021-04-15 02:29:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:11,692 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-04-15 02:29:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:29:11,692 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 22 [2021-04-15 02:29:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:11,695 INFO L225 Difference]: With dead ends: 2210 [2021-04-15 02:29:11,695 INFO L226 Difference]: Without dead ends: 2210 [2021-04-15 02:29:11,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-04-15 02:29:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-04-15 02:29:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-04-15 02:29:11,737 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-04-15 02:29:11,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:11,737 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-04-15 02:29:11,737 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) [2021-04-15 02:29:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-04-15 02:29:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:11,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:11,739 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:11,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24502,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:11,940 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-04-15 02:29:11,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:11,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979580957] [2021-04-15 02:29:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979580957] [2021-04-15 02:29:12,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926579497] [2021-04-15 02:29:12,005 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 [2021-04-15 02:29:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:12,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:12,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:12,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:12,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938234578] [2021-04-15 02:29:12,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:12,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:12,069 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 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) [2021-04-15 02:29:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,229 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-04-15 02:29:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:12,229 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 22 [2021-04-15 02:29:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,232 INFO L225 Difference]: With dead ends: 2207 [2021-04-15 02:29:12,232 INFO L226 Difference]: Without dead ends: 2205 [2021-04-15 02:29:12,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-04-15 02:29:12,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-04-15 02:29:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-04-15 02:29:12,257 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-04-15 02:29:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:12,257 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-04-15 02:29:12,257 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) [2021-04-15 02:29:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-04-15 02:29:12,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:12,259 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:12,260 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:12,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24503 [2021-04-15 02:29:12,473 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-04-15 02:29:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:12,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066528194] [2021-04-15 02:29:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066528194] [2021-04-15 02:29:12,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505513811] [2021-04-15 02:29:12,546 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 [2021-04-15 02:29:12,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:12,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:12,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935297490] [2021-04-15 02:29:12,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:12,602 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 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) [2021-04-15 02:29:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:12,765 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-04-15 02:29:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:12,766 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 22 [2021-04-15 02:29:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:12,768 INFO L225 Difference]: With dead ends: 2091 [2021-04-15 02:29:12,768 INFO L226 Difference]: Without dead ends: 2089 [2021-04-15 02:29:12,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-04-15 02:29:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-04-15 02:29:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-04-15 02:29:12,789 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-04-15 02:29:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:12,790 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-04-15 02:29:12,790 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) [2021-04-15 02:29:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-04-15 02:29:12,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:12,792 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:12,792 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:12,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24504 [2021-04-15 02:29:12,993 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-04-15 02:29:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:12,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878972056] [2021-04-15 02:29:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878972056] [2021-04-15 02:29:13,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278116921] [2021-04-15 02:29:13,065 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 [2021-04-15 02:29:13,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:13,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:13,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:13,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952578733] [2021-04-15 02:29:13,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:13,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:13,130 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 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) [2021-04-15 02:29:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:13,196 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-04-15 02:29:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:13,197 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 22 [2021-04-15 02:29:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:13,200 INFO L225 Difference]: With dead ends: 2273 [2021-04-15 02:29:13,200 INFO L226 Difference]: Without dead ends: 2273 [2021-04-15 02:29:13,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-04-15 02:29:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-04-15 02:29:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-04-15 02:29:13,222 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-04-15 02:29:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:13,222 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-04-15 02:29:13,222 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) [2021-04-15 02:29:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-04-15 02:29:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:13,224 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:13,224 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24505,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,425 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-04-15 02:29:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203315193] [2021-04-15 02:29:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203315193] [2021-04-15 02:29:13,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709579415] [2021-04-15 02:29:13,497 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 [2021-04-15 02:29:13,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:13,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:13,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636259143] [2021-04-15 02:29:13,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:13,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:13,568 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 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) [2021-04-15 02:29:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:13,748 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-04-15 02:29:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:13,748 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 22 [2021-04-15 02:29:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:13,751 INFO L225 Difference]: With dead ends: 2019 [2021-04-15 02:29:13,751 INFO L226 Difference]: Without dead ends: 2017 [2021-04-15 02:29:13,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-04-15 02:29:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-04-15 02:29:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-04-15 02:29:13,770 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-04-15 02:29:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:13,771 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-04-15 02:29:13,771 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) [2021-04-15 02:29:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-04-15 02:29:13,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:13,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:13,773 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:13,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24506,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:13,981 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:13,981 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-04-15 02:29:13,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:13,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977417537] [2021-04-15 02:29:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977417537] [2021-04-15 02:29:14,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188707344] [2021-04-15 02:29:14,057 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 [2021-04-15 02:29:14,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238770110] [2021-04-15 02:29:14,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:14,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:14,150 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 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) [2021-04-15 02:29:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:14,232 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-04-15 02:29:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:14,233 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 22 [2021-04-15 02:29:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:14,236 INFO L225 Difference]: With dead ends: 2414 [2021-04-15 02:29:14,236 INFO L226 Difference]: Without dead ends: 2414 [2021-04-15 02:29:14,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-04-15 02:29:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-04-15 02:29:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-04-15 02:29:14,262 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-04-15 02:29:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,262 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-04-15 02:29:14,262 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) [2021-04-15 02:29:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-04-15 02:29:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:14,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,264 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24507,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,480 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-04-15 02:29:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241843628] [2021-04-15 02:29:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:14,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241843628] [2021-04-15 02:29:14,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789846893] [2021-04-15 02:29:14,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:14,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:14,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:14,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:14,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448084486] [2021-04-15 02:29:14,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:14,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:14,612 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 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) [2021-04-15 02:29:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:14,726 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-04-15 02:29:14,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:14,726 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 22 [2021-04-15 02:29:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:14,728 INFO L225 Difference]: With dead ends: 2122 [2021-04-15 02:29:14,729 INFO L226 Difference]: Without dead ends: 2122 [2021-04-15 02:29:14,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:29:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-04-15 02:29:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-04-15 02:29:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-04-15 02:29:14,750 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-04-15 02:29:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:14,750 INFO L480 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-04-15 02:29:14,750 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) [2021-04-15 02:29:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-04-15 02:29:14,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:14,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:14,752 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:14,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24508 [2021-04-15 02:29:14,952 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-04-15 02:29:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:14,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675790913] [2021-04-15 02:29:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675790913] [2021-04-15 02:29:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788443627] [2021-04-15 02:29:15,032 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 [2021-04-15 02:29:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:15,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:15,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629141144] [2021-04-15 02:29:15,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:15,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:15,087 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 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) [2021-04-15 02:29:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,256 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-04-15 02:29:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:15,256 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 22 [2021-04-15 02:29:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,259 INFO L225 Difference]: With dead ends: 2095 [2021-04-15 02:29:15,259 INFO L226 Difference]: Without dead ends: 2093 [2021-04-15 02:29:15,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-04-15 02:29:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-04-15 02:29:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-04-15 02:29:15,282 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-04-15 02:29:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:15,282 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-04-15 02:29:15,282 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) [2021-04-15 02:29:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-04-15 02:29:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:15,284 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:15,284 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:15,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24509,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:15,485 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:15,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:15,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-04-15 02:29:15,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:15,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309292885] [2021-04-15 02:29:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309292885] [2021-04-15 02:29:15,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680867087] [2021-04-15 02:29:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:15,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:15,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:15,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:15,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:15,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:15,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997913741] [2021-04-15 02:29:15,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:15,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:15,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:15,604 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 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) [2021-04-15 02:29:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:15,762 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-04-15 02:29:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:15,763 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 22 [2021-04-15 02:29:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:15,765 INFO L225 Difference]: With dead ends: 1994 [2021-04-15 02:29:15,765 INFO L226 Difference]: Without dead ends: 1992 [2021-04-15 02:29:15,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-04-15 02:29:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-04-15 02:29:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-04-15 02:29:15,786 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-04-15 02:29:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:15,786 INFO L480 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-04-15 02:29:15,786 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) [2021-04-15 02:29:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-04-15 02:29:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:15,788 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:15,788 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:15,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24510 [2021-04-15 02:29:15,989 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:15,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-04-15 02:29:15,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:15,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963555903] [2021-04-15 02:29:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963555903] [2021-04-15 02:29:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489090894] [2021-04-15 02:29:16,053 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 [2021-04-15 02:29:16,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:16,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:16,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402271882] [2021-04-15 02:29:16,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:16,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:16,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:16,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:16,116 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 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) [2021-04-15 02:29:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:16,181 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-04-15 02:29:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:16,182 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 22 [2021-04-15 02:29:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,184 INFO L225 Difference]: With dead ends: 2201 [2021-04-15 02:29:16,184 INFO L226 Difference]: Without dead ends: 2201 [2021-04-15 02:29:16,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-04-15 02:29:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-04-15 02:29:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-04-15 02:29:16,208 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-04-15 02:29:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:16,208 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-04-15 02:29:16,208 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) [2021-04-15 02:29:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-04-15 02:29:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:16,211 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:16,212 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:16,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24511 [2021-04-15 02:29:16,425 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-04-15 02:29:16,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:16,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043996045] [2021-04-15 02:29:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043996045] [2021-04-15 02:29:16,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866846793] [2021-04-15 02:29:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:16,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:16,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:16,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:16,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:16,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:16,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820701511] [2021-04-15 02:29:16,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:16,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:16,589 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 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) [2021-04-15 02:29:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:16,756 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-04-15 02:29:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:16,757 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 22 [2021-04-15 02:29:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:16,759 INFO L225 Difference]: With dead ends: 1990 [2021-04-15 02:29:16,759 INFO L226 Difference]: Without dead ends: 1988 [2021-04-15 02:29:16,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-04-15 02:29:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-04-15 02:29:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-04-15 02:29:16,778 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-04-15 02:29:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:16,779 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-04-15 02:29:16,779 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) [2021-04-15 02:29:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-04-15 02:29:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:16,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:16,781 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:16,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24512 [2021-04-15 02:29:16,981 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:16,982 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-04-15 02:29:16,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:16,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125105655] [2021-04-15 02:29:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125105655] [2021-04-15 02:29:17,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687138937] [2021-04-15 02:29:17,047 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 [2021-04-15 02:29:17,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:17,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137764525] [2021-04-15 02:29:17,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:17,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:17,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:17,114 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 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) [2021-04-15 02:29:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,200 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-04-15 02:29:17,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:17,200 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 22 [2021-04-15 02:29:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,203 INFO L225 Difference]: With dead ends: 2351 [2021-04-15 02:29:17,203 INFO L226 Difference]: Without dead ends: 2351 [2021-04-15 02:29:17,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-04-15 02:29:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-04-15 02:29:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-04-15 02:29:17,224 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-04-15 02:29:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,224 INFO L480 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-04-15 02:29:17,224 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) [2021-04-15 02:29:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-04-15 02:29:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:17,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,226 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:17,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24513 [2021-04-15 02:29:17,427 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-04-15 02:29:17,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:17,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283957861] [2021-04-15 02:29:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283957861] [2021-04-15 02:29:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401255896] [2021-04-15 02:29:17,498 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 [2021-04-15 02:29:17,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:17,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:17,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:17,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:17,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142458048] [2021-04-15 02:29:17,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:17,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:17,585 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 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) [2021-04-15 02:29:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:17,776 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-04-15 02:29:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:17,776 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 22 [2021-04-15 02:29:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:17,778 INFO L225 Difference]: With dead ends: 1995 [2021-04-15 02:29:17,779 INFO L226 Difference]: Without dead ends: 1992 [2021-04-15 02:29:17,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:17,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-04-15 02:29:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-04-15 02:29:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:17,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-04-15 02:29:17,799 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-04-15 02:29:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:17,799 INFO L480 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-04-15 02:29:17,799 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) [2021-04-15 02:29:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-04-15 02:29:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:17,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:17,801 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24514,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,001 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-04-15 02:29:18,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445357672] [2021-04-15 02:29:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445357672] [2021-04-15 02:29:18,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522331842] [2021-04-15 02:29:18,072 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 [2021-04-15 02:29:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:18,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779176019] [2021-04-15 02:29:18,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:18,136 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 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) [2021-04-15 02:29:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:18,265 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-04-15 02:29:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:29:18,265 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 22 [2021-04-15 02:29:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:18,269 INFO L225 Difference]: With dead ends: 3202 [2021-04-15 02:29:18,269 INFO L226 Difference]: Without dead ends: 3202 [2021-04-15 02:29:18,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-04-15 02:29:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-04-15 02:29:18,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-04-15 02:29:18,302 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-04-15 02:29:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:18,302 INFO L480 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-04-15 02:29:18,302 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) [2021-04-15 02:29:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-04-15 02:29:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:18,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:18,305 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:18,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24515,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:18,505 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-04-15 02:29:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:18,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307655815] [2021-04-15 02:29:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307655815] [2021-04-15 02:29:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329255549] [2021-04-15 02:29:18,573 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 [2021-04-15 02:29:18,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:18,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:18,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726641235] [2021-04-15 02:29:18,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:18,640 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 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) [2021-04-15 02:29:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:18,775 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-04-15 02:29:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:18,776 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 22 [2021-04-15 02:29:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:18,779 INFO L225 Difference]: With dead ends: 2785 [2021-04-15 02:29:18,779 INFO L226 Difference]: Without dead ends: 2785 [2021-04-15 02:29:18,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:18,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-04-15 02:29:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-04-15 02:29:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-04-15 02:29:18,805 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-04-15 02:29:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:18,805 INFO L480 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-04-15 02:29:18,805 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) [2021-04-15 02:29:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-04-15 02:29:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:18,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:18,807 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:19,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24516 [2021-04-15 02:29:19,008 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-04-15 02:29:19,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927067039] [2021-04-15 02:29:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927067039] [2021-04-15 02:29:19,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752925948] [2021-04-15 02:29:19,080 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 [2021-04-15 02:29:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:19,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:19,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249119467] [2021-04-15 02:29:19,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:19,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:19,135 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 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) [2021-04-15 02:29:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:19,294 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-04-15 02:29:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:19,295 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 22 [2021-04-15 02:29:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:19,298 INFO L225 Difference]: With dead ends: 2747 [2021-04-15 02:29:19,298 INFO L226 Difference]: Without dead ends: 2745 [2021-04-15 02:29:19,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-04-15 02:29:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-04-15 02:29:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-04-15 02:29:19,327 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-04-15 02:29:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:19,327 INFO L480 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-04-15 02:29:19,327 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) [2021-04-15 02:29:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-04-15 02:29:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:19,329 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:19,329 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:19,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24517,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:19,530 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-04-15 02:29:19,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:19,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806797056] [2021-04-15 02:29:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806797056] [2021-04-15 02:29:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005468116] [2021-04-15 02:29:19,592 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 [2021-04-15 02:29:19,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:19,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:19,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:19,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:19,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:19,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090782957] [2021-04-15 02:29:19,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:19,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:19,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:19,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:19,657 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 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) [2021-04-15 02:29:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:19,823 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-04-15 02:29:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:19,824 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 22 [2021-04-15 02:29:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:19,827 INFO L225 Difference]: With dead ends: 2659 [2021-04-15 02:29:19,827 INFO L226 Difference]: Without dead ends: 2657 [2021-04-15 02:29:19,827 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-04-15 02:29:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-04-15 02:29:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-04-15 02:29:19,854 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-04-15 02:29:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:19,854 INFO L480 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-04-15 02:29:19,854 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) [2021-04-15 02:29:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-04-15 02:29:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:19,856 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:19,857 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:20,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24518 [2021-04-15 02:29:20,058 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-04-15 02:29:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:20,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478963363] [2021-04-15 02:29:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478963363] [2021-04-15 02:29:20,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278049740] [2021-04-15 02:29:20,126 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 [2021-04-15 02:29:20,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:20,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:20,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002489344] [2021-04-15 02:29:20,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:20,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:20,185 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 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) [2021-04-15 02:29:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,256 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-04-15 02:29:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:20,257 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 22 [2021-04-15 02:29:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,260 INFO L225 Difference]: With dead ends: 2808 [2021-04-15 02:29:20,260 INFO L226 Difference]: Without dead ends: 2808 [2021-04-15 02:29:20,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-04-15 02:29:20,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-04-15 02:29:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-04-15 02:29:20,293 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-04-15 02:29:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,293 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-04-15 02:29:20,293 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) [2021-04-15 02:29:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-04-15 02:29:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:20,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,295 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:20,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24519,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:20,496 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-04-15 02:29:20,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:20,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940564112] [2021-04-15 02:29:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940564112] [2021-04-15 02:29:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336240320] [2021-04-15 02:29:20,566 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 [2021-04-15 02:29:20,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:20,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:20,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:20,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:20,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:20,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494233023] [2021-04-15 02:29:20,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:20,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:20,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:20,642 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 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) [2021-04-15 02:29:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:20,824 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-04-15 02:29:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:20,824 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 22 [2021-04-15 02:29:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:20,827 INFO L225 Difference]: With dead ends: 2648 [2021-04-15 02:29:20,827 INFO L226 Difference]: Without dead ends: 2646 [2021-04-15 02:29:20,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-04-15 02:29:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-04-15 02:29:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-04-15 02:29:20,855 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-04-15 02:29:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:20,855 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-04-15 02:29:20,855 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) [2021-04-15 02:29:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-04-15 02:29:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:20,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:20,857 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:21,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24520 [2021-04-15 02:29:21,058 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-04-15 02:29:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:21,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125085948] [2021-04-15 02:29:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125085948] [2021-04-15 02:29:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806104131] [2021-04-15 02:29:21,124 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 [2021-04-15 02:29:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:21,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:21,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760919763] [2021-04-15 02:29:21,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:21,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:21,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:21,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:21,198 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 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) [2021-04-15 02:29:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:21,285 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-04-15 02:29:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:21,286 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 22 [2021-04-15 02:29:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:21,289 INFO L225 Difference]: With dead ends: 2940 [2021-04-15 02:29:21,289 INFO L226 Difference]: Without dead ends: 2940 [2021-04-15 02:29:21,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-04-15 02:29:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-04-15 02:29:21,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-04-15 02:29:21,317 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-04-15 02:29:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:21,317 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-04-15 02:29:21,317 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) [2021-04-15 02:29:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-04-15 02:29:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:21,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:21,319 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:21,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24521 [2021-04-15 02:29:21,529 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-04-15 02:29:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:21,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577061165] [2021-04-15 02:29:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577061165] [2021-04-15 02:29:21,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128545499] [2021-04-15 02:29:21,600 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 [2021-04-15 02:29:21,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:21,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:21,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:21,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887535609] [2021-04-15 02:29:21,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:21,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:21,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:21,665 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 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) [2021-04-15 02:29:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:21,830 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-04-15 02:29:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:21,832 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 22 [2021-04-15 02:29:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:21,835 INFO L225 Difference]: With dead ends: 2660 [2021-04-15 02:29:21,835 INFO L226 Difference]: Without dead ends: 2657 [2021-04-15 02:29:21,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-04-15 02:29:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-04-15 02:29:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-04-15 02:29:21,861 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-04-15 02:29:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:21,861 INFO L480 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-04-15 02:29:21,861 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) [2021-04-15 02:29:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-04-15 02:29:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:21,863 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:21,863 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24522 [2021-04-15 02:29:22,064 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-04-15 02:29:22,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56166790] [2021-04-15 02:29:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56166790] [2021-04-15 02:29:22,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102222337] [2021-04-15 02:29:22,135 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 [2021-04-15 02:29:22,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:22,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:22,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919435052] [2021-04-15 02:29:22,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:22,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:22,205 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 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) [2021-04-15 02:29:22,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,308 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-04-15 02:29:22,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:22,308 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 22 [2021-04-15 02:29:22,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,314 INFO L225 Difference]: With dead ends: 4123 [2021-04-15 02:29:22,314 INFO L226 Difference]: Without dead ends: 4123 [2021-04-15 02:29:22,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-04-15 02:29:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-04-15 02:29:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-04-15 02:29:22,369 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-04-15 02:29:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:22,370 INFO L480 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-04-15 02:29:22,370 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) [2021-04-15 02:29:22,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-04-15 02:29:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:22,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:22,373 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:22,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24523,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,573 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-04-15 02:29:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:22,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960163645] [2021-04-15 02:29:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960163645] [2021-04-15 02:29:22,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469416274] [2021-04-15 02:29:22,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:22,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:22,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:22,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:22,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:22,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:22,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422074293] [2021-04-15 02:29:22,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:22,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:22,704 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 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) [2021-04-15 02:29:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:22,881 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-04-15 02:29:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:22,881 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 22 [2021-04-15 02:29:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:22,887 INFO L225 Difference]: With dead ends: 3810 [2021-04-15 02:29:22,887 INFO L226 Difference]: Without dead ends: 3806 [2021-04-15 02:29:22,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-04-15 02:29:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-04-15 02:29:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-04-15 02:29:22,939 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-04-15 02:29:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:22,939 INFO L480 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-04-15 02:29:22,939 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) [2021-04-15 02:29:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-04-15 02:29:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:22,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:22,942 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24524 [2021-04-15 02:29:23,158 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-04-15 02:29:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100680214] [2021-04-15 02:29:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100680214] [2021-04-15 02:29:23,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307234439] [2021-04-15 02:29:23,230 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 [2021-04-15 02:29:23,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076659984] [2021-04-15 02:29:23,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:23,305 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 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) [2021-04-15 02:29:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,455 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-04-15 02:29:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:23,455 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 22 [2021-04-15 02:29:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,463 INFO L225 Difference]: With dead ends: 5567 [2021-04-15 02:29:23,463 INFO L226 Difference]: Without dead ends: 5567 [2021-04-15 02:29:23,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-04-15 02:29:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-04-15 02:29:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-04-15 02:29:23,537 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-04-15 02:29:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:23,538 INFO L480 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-04-15 02:29:23,538 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) [2021-04-15 02:29:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-04-15 02:29:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:23,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:23,542 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:23,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24525,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:23,742 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-04-15 02:29:23,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:23,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057563984] [2021-04-15 02:29:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:23,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057563984] [2021-04-15 02:29:23,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650361323] [2021-04-15 02:29:23,805 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 [2021-04-15 02:29:23,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:29:23,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:23,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:23,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:23,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:23,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950311029] [2021-04-15 02:29:23,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:23,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:23,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:23,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:23,866 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 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) [2021-04-15 02:29:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:23,969 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-04-15 02:29:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:23,970 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 22 [2021-04-15 02:29:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:23,978 INFO L225 Difference]: With dead ends: 5072 [2021-04-15 02:29:23,978 INFO L226 Difference]: Without dead ends: 5072 [2021-04-15 02:29:23,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-04-15 02:29:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-04-15 02:29:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-04-15 02:29:24,050 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-04-15 02:29:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:24,050 INFO L480 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-04-15 02:29:24,050 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) [2021-04-15 02:29:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-04-15 02:29:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:24,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:24,054 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:24,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24526 [2021-04-15 02:29:24,255 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-04-15 02:29:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:24,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967350407] [2021-04-15 02:29:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967350407] [2021-04-15 02:29:24,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987503844] [2021-04-15 02:29:24,319 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 [2021-04-15 02:29:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:24,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:24,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:24,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342681200] [2021-04-15 02:29:24,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:24,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:24,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:24,375 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 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) [2021-04-15 02:29:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:24,552 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-04-15 02:29:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:24,552 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 22 [2021-04-15 02:29:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:24,560 INFO L225 Difference]: With dead ends: 5066 [2021-04-15 02:29:24,561 INFO L226 Difference]: Without dead ends: 5064 [2021-04-15 02:29:24,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-04-15 02:29:24,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-04-15 02:29:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-04-15 02:29:24,668 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-04-15 02:29:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-04-15 02:29:24,668 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) [2021-04-15 02:29:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-04-15 02:29:24,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:24,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:24,672 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:24,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24527,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:24,888 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-04-15 02:29:24,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:24,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719255033] [2021-04-15 02:29:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719255033] [2021-04-15 02:29:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134883163] [2021-04-15 02:29:24,954 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 [2021-04-15 02:29:24,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:24,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:24,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:25,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309764240] [2021-04-15 02:29:25,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:25,010 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 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) [2021-04-15 02:29:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:25,174 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-04-15 02:29:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:25,175 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 22 [2021-04-15 02:29:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:25,182 INFO L225 Difference]: With dead ends: 5001 [2021-04-15 02:29:25,182 INFO L226 Difference]: Without dead ends: 4999 [2021-04-15 02:29:25,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-04-15 02:29:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-04-15 02:29:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-04-15 02:29:25,255 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-04-15 02:29:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:25,255 INFO L480 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-04-15 02:29:25,255 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) [2021-04-15 02:29:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-04-15 02:29:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:25,273 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:25,273 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:25,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24528 [2021-04-15 02:29:25,477 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-04-15 02:29:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:25,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453646941] [2021-04-15 02:29:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453646941] [2021-04-15 02:29:25,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505171353] [2021-04-15 02:29:25,541 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 [2021-04-15 02:29:25,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:25,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:25,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:25,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:25,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504907790] [2021-04-15 02:29:25,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:25,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:25,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:25,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:25,626 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 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) [2021-04-15 02:29:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:25,704 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-04-15 02:29:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:29:25,704 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 22 [2021-04-15 02:29:25,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:25,712 INFO L225 Difference]: With dead ends: 5161 [2021-04-15 02:29:25,712 INFO L226 Difference]: Without dead ends: 5161 [2021-04-15 02:29:25,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-04-15 02:29:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-04-15 02:29:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-04-15 02:29:25,783 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-04-15 02:29:25,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:25,783 INFO L480 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-04-15 02:29:25,783 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) [2021-04-15 02:29:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-04-15 02:29:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:25,787 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:25,787 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:25,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24529,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:25,987 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-04-15 02:29:25,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:25,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128962773] [2021-04-15 02:29:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128962773] [2021-04-15 02:29:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481622834] [2021-04-15 02:29:26,051 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 [2021-04-15 02:29:26,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:26,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830443234] [2021-04-15 02:29:26,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:26,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:26,115 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 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) [2021-04-15 02:29:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:26,309 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-04-15 02:29:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:26,309 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 22 [2021-04-15 02:29:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:26,316 INFO L225 Difference]: With dead ends: 5011 [2021-04-15 02:29:26,316 INFO L226 Difference]: Without dead ends: 5009 [2021-04-15 02:29:26,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-04-15 02:29:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-04-15 02:29:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-04-15 02:29:26,383 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-04-15 02:29:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,384 INFO L480 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-04-15 02:29:26,384 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) [2021-04-15 02:29:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-04-15 02:29:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:26,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,387 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:26,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24530,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:26,601 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-04-15 02:29:26,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:26,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667039148] [2021-04-15 02:29:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667039148] [2021-04-15 02:29:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36802311] [2021-04-15 02:29:26,661 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 [2021-04-15 02:29:26,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:26,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:26,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:26,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:26,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:26,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68385125] [2021-04-15 02:29:26,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:26,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:26,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:26,729 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 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) [2021-04-15 02:29:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:26,840 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-04-15 02:29:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:26,841 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 22 [2021-04-15 02:29:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:26,846 INFO L225 Difference]: With dead ends: 5260 [2021-04-15 02:29:26,846 INFO L226 Difference]: Without dead ends: 5260 [2021-04-15 02:29:26,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-04-15 02:29:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-04-15 02:29:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-04-15 02:29:26,903 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-04-15 02:29:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:26,903 INFO L480 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-04-15 02:29:26,903 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) [2021-04-15 02:29:26,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-04-15 02:29:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:26,906 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:26,906 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24531,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:27,107 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-04-15 02:29:27,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348633962] [2021-04-15 02:29:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348633962] [2021-04-15 02:29:27,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632540163] [2021-04-15 02:29:27,175 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 [2021-04-15 02:29:27,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:29:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:27,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627038312] [2021-04-15 02:29:27,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:27,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:27,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:27,244 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 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) [2021-04-15 02:29:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,417 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-04-15 02:29:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:27,417 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 22 [2021-04-15 02:29:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,424 INFO L225 Difference]: With dead ends: 4999 [2021-04-15 02:29:27,424 INFO L226 Difference]: Without dead ends: 4996 [2021-04-15 02:29:27,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-04-15 02:29:27,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-04-15 02:29:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-04-15 02:29:27,492 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-04-15 02:29:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:27,492 INFO L480 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-04-15 02:29:27,492 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) [2021-04-15 02:29:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-04-15 02:29:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:27,495 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:27,495 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:27,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24532 [2021-04-15 02:29:27,711 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-04-15 02:29:27,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:27,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986656632] [2021-04-15 02:29:27,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986656632] [2021-04-15 02:29:27,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691515655] [2021-04-15 02:29:27,772 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 [2021-04-15 02:29:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:27,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:27,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018594391] [2021-04-15 02:29:27,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:27,837 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 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) [2021-04-15 02:29:27,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:27,956 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-04-15 02:29:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:27,956 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 22 [2021-04-15 02:29:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:27,971 INFO L225 Difference]: With dead ends: 8484 [2021-04-15 02:29:27,971 INFO L226 Difference]: Without dead ends: 8484 [2021-04-15 02:29:27,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-04-15 02:29:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-04-15 02:29:28,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-04-15 02:29:28,117 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-04-15 02:29:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:28,117 INFO L480 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-04-15 02:29:28,117 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) [2021-04-15 02:29:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-04-15 02:29:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:28,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:28,122 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:28,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24533 [2021-04-15 02:29:28,337 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:28,337 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-04-15 02:29:28,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:28,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402816840] [2021-04-15 02:29:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402816840] [2021-04-15 02:29:28,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545422204] [2021-04-15 02:29:28,414 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 [2021-04-15 02:29:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:28,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:28,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:28,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487512011] [2021-04-15 02:29:28,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:28,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:28,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:28,493 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 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) [2021-04-15 02:29:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:28,699 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-04-15 02:29:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:28,700 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 22 [2021-04-15 02:29:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:28,712 INFO L225 Difference]: With dead ends: 8250 [2021-04-15 02:29:28,713 INFO L226 Difference]: Without dead ends: 8246 [2021-04-15 02:29:28,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-04-15 02:29:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-04-15 02:29:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-04-15 02:29:28,830 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-04-15 02:29:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:28,830 INFO L480 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-04-15 02:29:28,830 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) [2021-04-15 02:29:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-04-15 02:29:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:28,834 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:28,834 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:29,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24534 [2021-04-15 02:29:29,035 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-04-15 02:29:29,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:29,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029855254] [2021-04-15 02:29:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029855254] [2021-04-15 02:29:29,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111754625] [2021-04-15 02:29:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:29,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:29,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:29,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:29,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776612128] [2021-04-15 02:29:29,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:29,175 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 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) [2021-04-15 02:29:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:29,323 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-04-15 02:29:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:29,323 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 22 [2021-04-15 02:29:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:29,340 INFO L225 Difference]: With dead ends: 11106 [2021-04-15 02:29:29,340 INFO L226 Difference]: Without dead ends: 11106 [2021-04-15 02:29:29,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-04-15 02:29:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-04-15 02:29:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-04-15 02:29:29,559 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-04-15 02:29:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:29,559 INFO L480 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-04-15 02:29:29,559 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) [2021-04-15 02:29:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-04-15 02:29:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:29,564 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:29,564 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:29,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24535 [2021-04-15 02:29:29,765 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:29,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-04-15 02:29:29,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:29,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448692992] [2021-04-15 02:29:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448692992] [2021-04-15 02:29:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178320080] [2021-04-15 02:29:29,837 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 [2021-04-15 02:29:29,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:29,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:29,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:29,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:29,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:29,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:29,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088173569] [2021-04-15 02:29:29,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:29,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:29,897 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 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) [2021-04-15 02:29:30,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:30,095 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-04-15 02:29:30,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:30,095 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 22 [2021-04-15 02:29:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:30,113 INFO L225 Difference]: With dead ends: 10860 [2021-04-15 02:29:30,113 INFO L226 Difference]: Without dead ends: 10855 [2021-04-15 02:29:30,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-04-15 02:29:30,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-04-15 02:29:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-04-15 02:29:30,271 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-04-15 02:29:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:30,272 INFO L480 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-04-15 02:29:30,272 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) [2021-04-15 02:29:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-04-15 02:29:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:30,276 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:30,276 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:30,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24536,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:30,477 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-04-15 02:29:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:30,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020523598] [2021-04-15 02:29:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020523598] [2021-04-15 02:29:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241616627] [2021-04-15 02:29:30,546 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 [2021-04-15 02:29:30,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:30,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:30,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:29:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916539488] [2021-04-15 02:29:30,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:30,614 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 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) [2021-04-15 02:29:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:30,854 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-04-15 02:29:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:30,855 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 22 [2021-04-15 02:29:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:30,881 INFO L225 Difference]: With dead ends: 13741 [2021-04-15 02:29:30,881 INFO L226 Difference]: Without dead ends: 13741 [2021-04-15 02:29:30,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:29:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-04-15 02:29:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-04-15 02:29:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-04-15 02:29:31,113 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-04-15 02:29:31,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,113 INFO L480 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-04-15 02:29:31,113 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) [2021-04-15 02:29:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-04-15 02:29:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:31,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,118 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24537,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:31,319 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-04-15 02:29:31,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203082641] [2021-04-15 02:29:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203082641] [2021-04-15 02:29:31,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212818154] [2021-04-15 02:29:31,382 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 [2021-04-15 02:29:31,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:31,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:31,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:31,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366308573] [2021-04-15 02:29:31,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:31,444 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 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) [2021-04-15 02:29:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:31,570 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-04-15 02:29:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:31,570 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 22 [2021-04-15 02:29:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:31,593 INFO L225 Difference]: With dead ends: 13222 [2021-04-15 02:29:31,593 INFO L226 Difference]: Without dead ends: 13222 [2021-04-15 02:29:31,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-04-15 02:29:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-04-15 02:29:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-04-15 02:29:31,779 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-04-15 02:29:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:31,779 INFO L480 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-04-15 02:29:31,779 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) [2021-04-15 02:29:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-04-15 02:29:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:31,784 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:31,784 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:31,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24538 [2021-04-15 02:29:31,984 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:31,984 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-04-15 02:29:31,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:31,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208686407] [2021-04-15 02:29:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208686407] [2021-04-15 02:29:32,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235395078] [2021-04-15 02:29:32,044 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 [2021-04-15 02:29:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:32,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527621497] [2021-04-15 02:29:32,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:32,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:32,098 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 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) [2021-04-15 02:29:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:32,304 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-04-15 02:29:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:32,304 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 22 [2021-04-15 02:29:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:32,329 INFO L225 Difference]: With dead ends: 13713 [2021-04-15 02:29:32,329 INFO L226 Difference]: Without dead ends: 13711 [2021-04-15 02:29:32,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-04-15 02:29:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-04-15 02:29:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-04-15 02:29:32,544 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-04-15 02:29:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:32,544 INFO L480 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-04-15 02:29:32,544 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) [2021-04-15 02:29:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-04-15 02:29:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:32,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:32,550 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:32,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24539,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:32,750 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:32,750 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-04-15 02:29:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:32,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228411456] [2021-04-15 02:29:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228411456] [2021-04-15 02:29:32,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438776782] [2021-04-15 02:29:32,835 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 [2021-04-15 02:29:32,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:32,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:32,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403023555] [2021-04-15 02:29:32,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:32,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:32,890 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 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) [2021-04-15 02:29:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,090 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-04-15 02:29:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:33,090 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 22 [2021-04-15 02:29:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,119 INFO L225 Difference]: With dead ends: 13655 [2021-04-15 02:29:33,119 INFO L226 Difference]: Without dead ends: 13653 [2021-04-15 02:29:33,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-04-15 02:29:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-04-15 02:29:33,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-04-15 02:29:33,394 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-04-15 02:29:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:33,394 INFO L480 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-04-15 02:29:33,394 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) [2021-04-15 02:29:33,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-04-15 02:29:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:33,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:33,400 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:33,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24540,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:33,600 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-04-15 02:29:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:33,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390713215] [2021-04-15 02:29:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:33,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390713215] [2021-04-15 02:29:33,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135556238] [2021-04-15 02:29:33,658 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 [2021-04-15 02:29:33,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:33,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:33,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:33,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910114673] [2021-04-15 02:29:33,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:33,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:33,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:33,718 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 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) [2021-04-15 02:29:33,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:33,814 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-04-15 02:29:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:29:33,814 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 22 [2021-04-15 02:29:33,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:33,839 INFO L225 Difference]: With dead ends: 13677 [2021-04-15 02:29:33,839 INFO L226 Difference]: Without dead ends: 13677 [2021-04-15 02:29:33,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-04-15 02:29:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-04-15 02:29:34,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-04-15 02:29:34,057 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-04-15 02:29:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:34,057 INFO L480 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-04-15 02:29:34,057 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) [2021-04-15 02:29:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-04-15 02:29:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:34,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:34,062 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:34,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24541,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,263 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:34,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-04-15 02:29:34,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:34,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136159776] [2021-04-15 02:29:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136159776] [2021-04-15 02:29:34,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080146235] [2021-04-15 02:29:34,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:34,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:34,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:34,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:34,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:34,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:34,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804807241] [2021-04-15 02:29:34,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:34,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:34,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:34,399 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 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) [2021-04-15 02:29:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:34,626 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-04-15 02:29:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:29:34,627 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 22 [2021-04-15 02:29:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:34,652 INFO L225 Difference]: With dead ends: 13337 [2021-04-15 02:29:34,652 INFO L226 Difference]: Without dead ends: 13335 [2021-04-15 02:29:34,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-04-15 02:29:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-04-15 02:29:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-04-15 02:29:34,854 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-04-15 02:29:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:34,854 INFO L480 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-04-15 02:29:34,854 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) [2021-04-15 02:29:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-04-15 02:29:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:34,859 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:34,859 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:35,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24542 [2021-04-15 02:29:35,062 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-04-15 02:29:35,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:35,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924450929] [2021-04-15 02:29:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924450929] [2021-04-15 02:29:35,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585742668] [2021-04-15 02:29:35,153 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 [2021-04-15 02:29:35,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:35,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:35,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:35,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551916704] [2021-04-15 02:29:35,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:35,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:35,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:35,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:35,216 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 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) [2021-04-15 02:29:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:35,339 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-04-15 02:29:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:35,340 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 22 [2021-04-15 02:29:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:35,364 INFO L225 Difference]: With dead ends: 14025 [2021-04-15 02:29:35,365 INFO L226 Difference]: Without dead ends: 14025 [2021-04-15 02:29:35,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-04-15 02:29:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-04-15 02:29:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-04-15 02:29:35,588 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-04-15 02:29:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:35,588 INFO L480 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-04-15 02:29:35,588 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) [2021-04-15 02:29:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-04-15 02:29:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:35,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:35,593 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:35,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24543 [2021-04-15 02:29:35,801 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-04-15 02:29:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:35,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700030816] [2021-04-15 02:29:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700030816] [2021-04-15 02:29:35,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306155963] [2021-04-15 02:29:35,877 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 [2021-04-15 02:29:35,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:35,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:35,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:35,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864721692] [2021-04-15 02:29:35,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:35,936 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 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) [2021-04-15 02:29:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:36,149 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-04-15 02:29:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:29:36,150 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 22 [2021-04-15 02:29:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:36,176 INFO L225 Difference]: With dead ends: 13344 [2021-04-15 02:29:36,176 INFO L226 Difference]: Without dead ends: 13341 [2021-04-15 02:29:36,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-04-15 02:29:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-04-15 02:29:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-04-15 02:29:36,394 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-04-15 02:29:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:36,394 INFO L480 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-04-15 02:29:36,394 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) [2021-04-15 02:29:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-04-15 02:29:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:36,399 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:36,399 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:36,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24544 [2021-04-15 02:29:36,600 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-04-15 02:29:36,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:36,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298715498] [2021-04-15 02:29:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298715498] [2021-04-15 02:29:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423786453] [2021-04-15 02:29:36,669 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 [2021-04-15 02:29:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:36,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:36,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:36,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994049193] [2021-04-15 02:29:36,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:36,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:36,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:36,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:36,740 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 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) [2021-04-15 02:29:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:36,909 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-04-15 02:29:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:36,910 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 22 [2021-04-15 02:29:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:36,957 INFO L225 Difference]: With dead ends: 23387 [2021-04-15 02:29:36,957 INFO L226 Difference]: Without dead ends: 23387 [2021-04-15 02:29:36,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-04-15 02:29:37,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-04-15 02:29:37,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-04-15 02:29:37,414 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-04-15 02:29:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:37,414 INFO L480 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-04-15 02:29:37,414 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) [2021-04-15 02:29:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-04-15 02:29:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:37,420 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:37,420 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:37,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24545 [2021-04-15 02:29:37,621 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-04-15 02:29:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:37,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472880789] [2021-04-15 02:29:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472880789] [2021-04-15 02:29:37,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301644528] [2021-04-15 02:29:37,694 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 [2021-04-15 02:29:37,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:37,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:37,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:37,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365114526] [2021-04-15 02:29:37,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:37,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:37,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:37,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:37,751 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 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) [2021-04-15 02:29:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:38,025 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-04-15 02:29:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:29:38,026 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 22 [2021-04-15 02:29:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:38,078 INFO L225 Difference]: With dead ends: 23234 [2021-04-15 02:29:38,078 INFO L226 Difference]: Without dead ends: 23230 [2021-04-15 02:29:38,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-04-15 02:29:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-04-15 02:29:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-04-15 02:29:38,518 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-04-15 02:29:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:38,518 INFO L480 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-04-15 02:29:38,518 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) [2021-04-15 02:29:38,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-04-15 02:29:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:38,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:38,524 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:38,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24546 [2021-04-15 02:29:38,724 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-04-15 02:29:38,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:38,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406675090] [2021-04-15 02:29:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406675090] [2021-04-15 02:29:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375807660] [2021-04-15 02:29:38,793 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 [2021-04-15 02:29:38,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:38,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:38,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964849908] [2021-04-15 02:29:38,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:38,857 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 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) [2021-04-15 02:29:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:39,052 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-04-15 02:29:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:39,052 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 22 [2021-04-15 02:29:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:39,113 INFO L225 Difference]: With dead ends: 28918 [2021-04-15 02:29:39,113 INFO L226 Difference]: Without dead ends: 28918 [2021-04-15 02:29:39,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:29:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-04-15 02:29:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-04-15 02:29:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-04-15 02:29:39,656 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-04-15 02:29:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:39,656 INFO L480 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-04-15 02:29:39,657 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) [2021-04-15 02:29:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-04-15 02:29:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:39,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:39,662 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:39,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24547,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:39,863 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-04-15 02:29:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:39,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124858052] [2021-04-15 02:29:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124858052] [2021-04-15 02:29:39,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305507656] [2021-04-15 02:29:39,937 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 [2021-04-15 02:29:39,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:39,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:39,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:39,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:39,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539534926] [2021-04-15 02:29:39,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:39,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:39,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:39,991 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 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) [2021-04-15 02:29:40,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:40,336 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-04-15 02:29:40,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:40,337 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 22 [2021-04-15 02:29:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:40,397 INFO L225 Difference]: With dead ends: 28872 [2021-04-15 02:29:40,397 INFO L226 Difference]: Without dead ends: 28867 [2021-04-15 02:29:40,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-04-15 02:29:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-04-15 02:29:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-04-15 02:29:40,926 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-04-15 02:29:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:40,926 INFO L480 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-04-15 02:29:40,926 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) [2021-04-15 02:29:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-04-15 02:29:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:40,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:40,932 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:41,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24548 [2021-04-15 02:29:41,139 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-04-15 02:29:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:41,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475443383] [2021-04-15 02:29:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475443383] [2021-04-15 02:29:41,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592598928] [2021-04-15 02:29:41,209 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 [2021-04-15 02:29:41,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:29:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:41,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:41,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:41,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257622054] [2021-04-15 02:29:41,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:41,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:41,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:41,294 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 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) [2021-04-15 02:29:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:41,569 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-04-15 02:29:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:29:41,569 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 22 [2021-04-15 02:29:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:41,639 INFO L225 Difference]: With dead ends: 31093 [2021-04-15 02:29:41,639 INFO L226 Difference]: Without dead ends: 31093 [2021-04-15 02:29:41,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:29:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-04-15 02:29:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-04-15 02:29:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-04-15 02:29:42,209 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-04-15 02:29:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:42,209 INFO L480 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-04-15 02:29:42,210 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) [2021-04-15 02:29:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-04-15 02:29:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:42,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:42,216 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:42,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24549 [2021-04-15 02:29:42,416 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-04-15 02:29:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479250608] [2021-04-15 02:29:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479250608] [2021-04-15 02:29:42,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513813493] [2021-04-15 02:29:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:29:42,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:29:42,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:42,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:42,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161619767] [2021-04-15 02:29:42,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:42,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:42,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:42,554 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 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) [2021-04-15 02:29:42,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:42,860 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-04-15 02:29:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:42,860 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 22 [2021-04-15 02:29:42,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:42,926 INFO L225 Difference]: With dead ends: 31001 [2021-04-15 02:29:42,926 INFO L226 Difference]: Without dead ends: 30995 [2021-04-15 02:29:42,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:29:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-04-15 02:29:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-04-15 02:29:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-04-15 02:29:43,670 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-04-15 02:29:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:43,670 INFO L480 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-04-15 02:29:43,670 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) [2021-04-15 02:29:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-04-15 02:29:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:43,676 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:43,676 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:43,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24550,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:43,876 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:43,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:43,877 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-04-15 02:29:43,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:43,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384549106] [2021-04-15 02:29:43,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:43,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384549106] [2021-04-15 02:29:43,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059748637] [2021-04-15 02:29:43,952 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 [2021-04-15 02:29:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:44,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:44,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:29:44,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526457262] [2021-04-15 02:29:44,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:29:44,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:29:44,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:29:44,011 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 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) [2021-04-15 02:29:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:44,373 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-04-15 02:29:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:29:44,373 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 22 [2021-04-15 02:29:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:44,443 INFO L225 Difference]: With dead ends: 32605 [2021-04-15 02:29:44,444 INFO L226 Difference]: Without dead ends: 32605 [2021-04-15 02:29:44,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:29:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-04-15 02:29:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-04-15 02:29:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-04-15 02:29:45,081 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-04-15 02:29:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:45,082 INFO L480 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-04-15 02:29:45,082 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) [2021-04-15 02:29:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-04-15 02:29:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:45,088 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:45,088 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:45,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24551,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:45,288 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:45,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-04-15 02:29:45,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:45,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061473629] [2021-04-15 02:29:45,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061473629] [2021-04-15 02:29:45,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750950846] [2021-04-15 02:29:45,335 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 [2021-04-15 02:29:45,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:45,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:29:45,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:45,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:29:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071319460] [2021-04-15 02:29:45,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:45,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:45,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:45,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:45,405 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 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) [2021-04-15 02:29:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:45,606 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-04-15 02:29:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:29:45,606 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 22 [2021-04-15 02:29:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:45,679 INFO L225 Difference]: With dead ends: 32258 [2021-04-15 02:29:45,679 INFO L226 Difference]: Without dead ends: 32258 [2021-04-15 02:29:45,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-04-15 02:29:46,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-04-15 02:29:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-04-15 02:29:46,384 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-04-15 02:29:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,384 INFO L480 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-04-15 02:29:46,384 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) [2021-04-15 02:29:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-04-15 02:29:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:46,390 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,390 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:46,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24552,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,590 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-04-15 02:29:46,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:46,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805920806] [2021-04-15 02:29:46,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:46,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805920806] [2021-04-15 02:29:46,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071475818] [2021-04-15 02:29:46,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:46,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:29:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 02:29:46,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:29:46,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113718582] [2021-04-15 02:29:46,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:29:46,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:29:46,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:29:46,692 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 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) [2021-04-15 02:29:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,967 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-04-15 02:29:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:29:46,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:46,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:47,039 INFO L225 Difference]: With dead ends: 36772 [2021-04-15 02:29:47,039 INFO L226 Difference]: Without dead ends: 36768 [2021-04-15 02:29:47,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-04-15 02:29:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-04-15 02:29:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-04-15 02:29:47,753 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-04-15 02:29:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:47,753 INFO L480 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-04-15 02:29:47,753 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) [2021-04-15 02:29:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-04-15 02:29:47,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:47,759 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:47,759 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24553 [2021-04-15 02:29:47,960 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-04-15 02:29:47,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571365057] [2021-04-15 02:29:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571365057] [2021-04-15 02:29:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292002788] [2021-04-15 02:29:48,012 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 [2021-04-15 02:29:48,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:48,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:48,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:48,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:48,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:29:48,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704748100] [2021-04-15 02:29:48,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:29:48,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:29:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:48,066 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 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) [2021-04-15 02:29:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:48,330 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-04-15 02:29:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:48,331 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 22 [2021-04-15 02:29:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:48,420 INFO L225 Difference]: With dead ends: 36756 [2021-04-15 02:29:48,420 INFO L226 Difference]: Without dead ends: 36753 [2021-04-15 02:29:48,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:29:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-04-15 02:29:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-04-15 02:29:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-04-15 02:29:49,277 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-04-15 02:29:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:49,277 INFO L480 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-04-15 02:29:49,277 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) [2021-04-15 02:29:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-04-15 02:29:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:49,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:49,283 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:49,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24554 [2021-04-15 02:29:49,484 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-04-15 02:29:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590726364] [2021-04-15 02:29:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590726364] [2021-04-15 02:29:49,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117581458] [2021-04-15 02:29:49,534 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 [2021-04-15 02:29:49,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:29:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:49,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:29:49,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:49,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:29:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118118754] [2021-04-15 02:29:49,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:29:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:49,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:29:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:29:49,595 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 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) [2021-04-15 02:29:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:49,834 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-04-15 02:29:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:29:49,835 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 22 [2021-04-15 02:29:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:49,920 INFO L225 Difference]: With dead ends: 38596 [2021-04-15 02:29:49,920 INFO L226 Difference]: Without dead ends: 38596 [2021-04-15 02:29:49,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:29:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-04-15 02:29:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-04-15 02:29:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-04-15 02:29:50,680 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-04-15 02:29:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:50,680 INFO L480 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-04-15 02:29:50,680 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) [2021-04-15 02:29:50,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-04-15 02:29:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:50,687 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:50,687 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:50,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24555 [2021-04-15 02:29:50,887 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-04-15 02:29:50,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:50,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495173433] [2021-04-15 02:29:50,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495173433] [2021-04-15 02:29:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015050804] [2021-04-15 02:29:50,942 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 [2021-04-15 02:29:50,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:29:50,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:50,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:50,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:29:50,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625648461] [2021-04-15 02:29:50,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:29:50,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:50,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:29:50,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:50,998 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 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) [2021-04-15 02:29:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:51,256 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-04-15 02:29:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:51,348 INFO L225 Difference]: With dead ends: 38447 [2021-04-15 02:29:51,348 INFO L226 Difference]: Without dead ends: 38444 [2021-04-15 02:29:51,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-04-15 02:29:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-04-15 02:29:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-04-15 02:29:52,238 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-04-15 02:29:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:52,238 INFO L480 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-04-15 02:29:52,238 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) [2021-04-15 02:29:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-04-15 02:29:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:52,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:52,245 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:52,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24556 [2021-04-15 02:29:52,445 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-04-15 02:29:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:52,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543939600] [2021-04-15 02:29:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:52,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543939600] [2021-04-15 02:29:52,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67259381] [2021-04-15 02:29:52,512 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 [2021-04-15 02:29:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:52,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:52,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:52,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:29:52,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071505196] [2021-04-15 02:29:52,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:29:52,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:29:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:52,571 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 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) [2021-04-15 02:29:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:52,844 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-04-15 02:29:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:29:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:52,959 INFO L225 Difference]: With dead ends: 47743 [2021-04-15 02:29:52,959 INFO L226 Difference]: Without dead ends: 47743 [2021-04-15 02:29:52,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:29:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-04-15 02:29:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-04-15 02:29:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-04-15 02:29:54,289 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-04-15 02:29:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:54,289 INFO L480 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-04-15 02:29:54,289 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) [2021-04-15 02:29:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-04-15 02:29:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:54,314 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:54,314 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:54,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24557,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:54,528 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-04-15 02:29:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75686729] [2021-04-15 02:29:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75686729] [2021-04-15 02:29:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939540335] [2021-04-15 02:29:54,765 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 [2021-04-15 02:29:54,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:29:54,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:54,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:54,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:54,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:54,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:29:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218004447] [2021-04-15 02:29:54,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:29:54,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:29:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:54,822 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 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) [2021-04-15 02:29:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:55,240 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-04-15 02:29:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:29:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:55,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:55,341 INFO L225 Difference]: With dead ends: 46705 [2021-04-15 02:29:55,341 INFO L226 Difference]: Without dead ends: 46701 [2021-04-15 02:29:55,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:29:55,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-04-15 02:29:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-04-15 02:29:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-04-15 02:29:56,432 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-04-15 02:29:56,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:56,432 INFO L480 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-04-15 02:29:56,432 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) [2021-04-15 02:29:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-04-15 02:29:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:56,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:56,440 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:56,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24558 [2021-04-15 02:29:56,640 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-04-15 02:29:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:56,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114652977] [2021-04-15 02:29:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:56,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114652977] [2021-04-15 02:29:56,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282985314] [2021-04-15 02:29:56,704 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 [2021-04-15 02:29:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:29:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:29:56,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:56,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:29:56,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079158723] [2021-04-15 02:29:56,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:29:56,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:56,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:29:56,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:29:56,779 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 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) [2021-04-15 02:29:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:57,252 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-04-15 02:29:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:29:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:57,485 INFO L225 Difference]: With dead ends: 49378 [2021-04-15 02:29:57,485 INFO L226 Difference]: Without dead ends: 49378 [2021-04-15 02:29:57,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:29:57,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-04-15 02:29:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-04-15 02:29:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-04-15 02:29:58,578 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-04-15 02:29:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:58,578 INFO L480 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-04-15 02:29:58,578 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) [2021-04-15 02:29:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-04-15 02:29:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:29:58,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:58,585 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:58,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24559 [2021-04-15 02:29:58,800 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-04-15 02:29:58,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:58,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021188870] [2021-04-15 02:29:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:58,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021188870] [2021-04-15 02:29:58,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132699205] [2021-04-15 02:29:58,867 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 [2021-04-15 02:29:58,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:29:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:29:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:29:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:58,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:58,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:29:58,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109956945] [2021-04-15 02:29:58,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:29:58,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:29:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:29:58,927 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 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) [2021-04-15 02:29:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:59,509 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-04-15 02:29:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:29:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:29:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:59,621 INFO L225 Difference]: With dead ends: 49336 [2021-04-15 02:29:59,621 INFO L226 Difference]: Without dead ends: 49333 [2021-04-15 02:29:59,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:29:59,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-04-15 02:30:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-04-15 02:30:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:00,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-04-15 02:30:00,723 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-04-15 02:30:00,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:00,723 INFO L480 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-04-15 02:30:00,723 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) [2021-04-15 02:30:00,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-04-15 02:30:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:00,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:00,730 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:00,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24560,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:00,931 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-04-15 02:30:00,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:00,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319275975] [2021-04-15 02:30:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:00,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319275975] [2021-04-15 02:30:00,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913150644] [2021-04-15 02:30:00,994 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 [2021-04-15 02:30:01,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:30:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:01,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:01,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:01,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467994632] [2021-04-15 02:30:01,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:01,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:01,061 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 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) [2021-04-15 02:30:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,597 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-04-15 02:30:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,753 INFO L225 Difference]: With dead ends: 55383 [2021-04-15 02:30:01,753 INFO L226 Difference]: Without dead ends: 55383 [2021-04-15 02:30:01,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:30:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-04-15 02:30:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-04-15 02:30:02,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-04-15 02:30:03,027 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-04-15 02:30:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:03,027 INFO L480 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-04-15 02:30:03,027 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) [2021-04-15 02:30:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-04-15 02:30:03,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:03,034 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:03,034 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:03,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24561,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:03,249 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-04-15 02:30:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:03,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343402849] [2021-04-15 02:30:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:03,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343402849] [2021-04-15 02:30:03,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136558523] [2021-04-15 02:30:03,348 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 [2021-04-15 02:30:03,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:03,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:03,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:03,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:03,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796234930] [2021-04-15 02:30:03,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:03,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:03,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:03,407 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 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) [2021-04-15 02:30:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:03,959 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-04-15 02:30:03,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:04,084 INFO L225 Difference]: With dead ends: 46465 [2021-04-15 02:30:04,084 INFO L226 Difference]: Without dead ends: 46461 [2021-04-15 02:30:04,085 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:30:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-04-15 02:30:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-04-15 02:30:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-04-15 02:30:05,218 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-04-15 02:30:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:05,218 INFO L480 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-04-15 02:30:05,218 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) [2021-04-15 02:30:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-04-15 02:30:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:05,225 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:05,225 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:05,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24562,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:05,429 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:05,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-04-15 02:30:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:05,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389971357] [2021-04-15 02:30:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389971357] [2021-04-15 02:30:05,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577531223] [2021-04-15 02:30:05,512 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 [2021-04-15 02:30:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:05,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:05,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:05,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939127761] [2021-04-15 02:30:05,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:05,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:05,576 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 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) [2021-04-15 02:30:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:06,184 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-04-15 02:30:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:30:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:06,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:06,344 INFO L225 Difference]: With dead ends: 53081 [2021-04-15 02:30:06,345 INFO L226 Difference]: Without dead ends: 53081 [2021-04-15 02:30:06,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-04-15 02:30:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-04-15 02:30:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-04-15 02:30:07,748 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-04-15 02:30:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:07,749 INFO L480 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-04-15 02:30:07,749 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) [2021-04-15 02:30:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-04-15 02:30:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:07,756 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:07,756 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:07,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24563,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:07,956 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-04-15 02:30:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:07,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966063784] [2021-04-15 02:30:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966063784] [2021-04-15 02:30:08,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056535641] [2021-04-15 02:30:08,023 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 [2021-04-15 02:30:08,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:08,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:08,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:08,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:08,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:08,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:08,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044907731] [2021-04-15 02:30:08,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:08,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:08,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:08,078 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 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) [2021-04-15 02:30:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:08,786 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-04-15 02:30:08,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:08,916 INFO L225 Difference]: With dead ends: 50456 [2021-04-15 02:30:08,917 INFO L226 Difference]: Without dead ends: 50451 [2021-04-15 02:30:08,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:30:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-04-15 02:30:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-04-15 02:30:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-04-15 02:30:10,063 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-04-15 02:30:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:10,063 INFO L480 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-04-15 02:30:10,063 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) [2021-04-15 02:30:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-04-15 02:30:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:10,070 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:10,070 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:10,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24564 [2021-04-15 02:30:10,271 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-04-15 02:30:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:10,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121870642] [2021-04-15 02:30:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:10,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121870642] [2021-04-15 02:30:10,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068616023] [2021-04-15 02:30:10,341 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 [2021-04-15 02:30:10,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:30:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:10,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:10,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:10,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296357769] [2021-04-15 02:30:10,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:10,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:10,405 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 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) [2021-04-15 02:30:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:11,113 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-04-15 02:30:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:11,239 INFO L225 Difference]: With dead ends: 51683 [2021-04-15 02:30:11,239 INFO L226 Difference]: Without dead ends: 51683 [2021-04-15 02:30:11,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-04-15 02:30:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-04-15 02:30:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-04-15 02:30:12,518 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-04-15 02:30:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:12,518 INFO L480 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-04-15 02:30:12,518 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) [2021-04-15 02:30:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-04-15 02:30:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:12,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:12,525 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:12,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24565 [2021-04-15 02:30:12,726 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-04-15 02:30:12,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:12,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34294603] [2021-04-15 02:30:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34294603] [2021-04-15 02:30:12,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030947943] [2021-04-15 02:30:12,798 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 [2021-04-15 02:30:12,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:12,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:12,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:12,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:12,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:12,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342600083] [2021-04-15 02:30:12,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:12,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:12,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:12,878 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 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) [2021-04-15 02:30:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:13,301 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-04-15 02:30:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:13,302 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 22 [2021-04-15 02:30:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:13,443 INFO L225 Difference]: With dead ends: 51540 [2021-04-15 02:30:13,443 INFO L226 Difference]: Without dead ends: 51537 [2021-04-15 02:30:13,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-04-15 02:30:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-04-15 02:30:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-04-15 02:30:14,999 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-04-15 02:30:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:14,999 INFO L480 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-04-15 02:30:14,999 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) [2021-04-15 02:30:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-04-15 02:30:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:15,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:15,006 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:15,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24566 [2021-04-15 02:30:15,214 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:15,214 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-04-15 02:30:15,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:15,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931512795] [2021-04-15 02:30:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931512795] [2021-04-15 02:30:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684112552] [2021-04-15 02:30:15,284 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 [2021-04-15 02:30:15,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:15,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:15,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:15,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:15,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626343628] [2021-04-15 02:30:15,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:15,373 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 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) [2021-04-15 02:30:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:15,712 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-04-15 02:30:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:15,713 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 22 [2021-04-15 02:30:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:15,858 INFO L225 Difference]: With dead ends: 54243 [2021-04-15 02:30:15,858 INFO L226 Difference]: Without dead ends: 54243 [2021-04-15 02:30:15,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-04-15 02:30:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-04-15 02:30:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-04-15 02:30:16,908 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-04-15 02:30:16,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:16,909 INFO L480 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-04-15 02:30:16,909 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) [2021-04-15 02:30:16,909 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-04-15 02:30:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:16,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:16,915 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:17,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24567 [2021-04-15 02:30:17,116 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-04-15 02:30:17,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:17,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59374909] [2021-04-15 02:30:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:17,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59374909] [2021-04-15 02:30:17,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788806968] [2021-04-15 02:30:17,195 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 [2021-04-15 02:30:17,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:17,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:17,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:17,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218648542] [2021-04-15 02:30:17,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:17,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:17,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:17,256 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 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) [2021-04-15 02:30:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:17,565 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-04-15 02:30:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:17,565 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 22 [2021-04-15 02:30:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:17,611 INFO L225 Difference]: With dead ends: 20359 [2021-04-15 02:30:17,611 INFO L226 Difference]: Without dead ends: 20355 [2021-04-15 02:30:17,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-04-15 02:30:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-04-15 02:30:18,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-04-15 02:30:18,172 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-04-15 02:30:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:18,172 INFO L480 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-04-15 02:30:18,172 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) [2021-04-15 02:30:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-04-15 02:30:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:18,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:18,178 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:18,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24568 [2021-04-15 02:30:18,379 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-04-15 02:30:18,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:18,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334813595] [2021-04-15 02:30:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:18,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334813595] [2021-04-15 02:30:18,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797042253] [2021-04-15 02:30:18,452 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 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 [2021-04-15 02:30:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:18,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:18,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:18,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019812210] [2021-04-15 02:30:18,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:18,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:18,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:18,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:18,511 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 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) [2021-04-15 02:30:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:18,718 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-04-15 02:30:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:18,718 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 22 [2021-04-15 02:30:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:18,776 INFO L225 Difference]: With dead ends: 28252 [2021-04-15 02:30:18,777 INFO L226 Difference]: Without dead ends: 28252 [2021-04-15 02:30:18,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-04-15 02:30:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-04-15 02:30:19,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-04-15 02:30:19,180 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-04-15 02:30:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:19,180 INFO L480 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-04-15 02:30:19,180 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) [2021-04-15 02:30:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-04-15 02:30:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:19,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:19,186 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:19,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24569,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:19,386 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:19,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-04-15 02:30:19,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:19,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812631362] [2021-04-15 02:30:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:19,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812631362] [2021-04-15 02:30:19,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641293435] [2021-04-15 02:30:19,484 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 [2021-04-15 02:30:19,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:19,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:19,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:19,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:19,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132131051] [2021-04-15 02:30:19,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:19,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:19,538 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 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) [2021-04-15 02:30:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:19,919 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-04-15 02:30:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:19,920 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 22 [2021-04-15 02:30:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:19,962 INFO L225 Difference]: With dead ends: 20123 [2021-04-15 02:30:19,962 INFO L226 Difference]: Without dead ends: 20118 [2021-04-15 02:30:19,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-04-15 02:30:20,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-04-15 02:30:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:20,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-04-15 02:30:20,305 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-04-15 02:30:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:20,305 INFO L480 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-04-15 02:30:20,305 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) [2021-04-15 02:30:20,306 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-04-15 02:30:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:20,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:20,312 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:20,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24570,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:20,512 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:20,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-04-15 02:30:20,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:20,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550511336] [2021-04-15 02:30:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550511336] [2021-04-15 02:30:20,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539064670] [2021-04-15 02:30:20,625 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 [2021-04-15 02:30:20,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:30:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:20,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:20,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:20,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:20,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77378121] [2021-04-15 02:30:20,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:20,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:20,687 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 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) [2021-04-15 02:30:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:20,922 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-04-15 02:30:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:20,924 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 22 [2021-04-15 02:30:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:20,967 INFO L225 Difference]: With dead ends: 21427 [2021-04-15 02:30:20,967 INFO L226 Difference]: Without dead ends: 21427 [2021-04-15 02:30:20,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-04-15 02:30:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-04-15 02:30:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-04-15 02:30:21,421 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-04-15 02:30:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:21,421 INFO L480 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-04-15 02:30:21,421 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) [2021-04-15 02:30:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-04-15 02:30:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:21,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:21,427 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:21,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24571,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:21,628 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:21,628 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-04-15 02:30:21,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:21,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954407982] [2021-04-15 02:30:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954407982] [2021-04-15 02:30:21,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298689409] [2021-04-15 02:30:21,705 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 [2021-04-15 02:30:21,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:21,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:21,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:21,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665191834] [2021-04-15 02:30:21,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:21,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:21,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:21,764 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 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) [2021-04-15 02:30:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:22,034 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-04-15 02:30:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:22,035 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 22 [2021-04-15 02:30:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:22,077 INFO L225 Difference]: With dead ends: 20188 [2021-04-15 02:30:22,077 INFO L226 Difference]: Without dead ends: 20182 [2021-04-15 02:30:22,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-04-15 02:30:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-04-15 02:30:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-04-15 02:30:22,610 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-04-15 02:30:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:22,610 INFO L480 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-04-15 02:30:22,610 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) [2021-04-15 02:30:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-04-15 02:30:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:22,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:22,616 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:22,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24572,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:22,817 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-04-15 02:30:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:22,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645577439] [2021-04-15 02:30:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645577439] [2021-04-15 02:30:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793374295] [2021-04-15 02:30:22,940 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 [2021-04-15 02:30:22,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:22,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:22,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:23,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:23,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597889270] [2021-04-15 02:30:23,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:23,024 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 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) [2021-04-15 02:30:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:23,384 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-04-15 02:30:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:23,385 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 22 [2021-04-15 02:30:23,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:23,422 INFO L225 Difference]: With dead ends: 20611 [2021-04-15 02:30:23,422 INFO L226 Difference]: Without dead ends: 20611 [2021-04-15 02:30:23,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-04-15 02:30:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-04-15 02:30:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-04-15 02:30:23,787 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-04-15 02:30:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:23,787 INFO L480 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-04-15 02:30:23,787 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) [2021-04-15 02:30:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-04-15 02:30:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:23,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:23,793 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:23,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24573,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:23,994 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-04-15 02:30:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:23,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197013669] [2021-04-15 02:30:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197013669] [2021-04-15 02:30:24,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437480120] [2021-04-15 02:30:24,058 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 [2021-04-15 02:30:24,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:24,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:24,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:24,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:24,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:24,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:24,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315156611] [2021-04-15 02:30:24,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:24,129 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 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) [2021-04-15 02:30:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:24,457 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-04-15 02:30:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:30:24,458 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 22 [2021-04-15 02:30:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:24,501 INFO L225 Difference]: With dead ends: 19840 [2021-04-15 02:30:24,501 INFO L226 Difference]: Without dead ends: 19840 [2021-04-15 02:30:24,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:30:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-04-15 02:30:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-04-15 02:30:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-04-15 02:30:24,913 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-04-15 02:30:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:24,913 INFO L480 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-04-15 02:30:24,913 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) [2021-04-15 02:30:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-04-15 02:30:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:24,920 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:24,920 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:25,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24574,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:25,120 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-04-15 02:30:25,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:25,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840612350] [2021-04-15 02:30:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840612350] [2021-04-15 02:30:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647701041] [2021-04-15 02:30:25,199 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 [2021-04-15 02:30:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:25,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:25,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:25,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100760156] [2021-04-15 02:30:25,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:25,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:25,262 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 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) [2021-04-15 02:30:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:25,503 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-04-15 02:30:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:25,503 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 22 [2021-04-15 02:30:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:25,540 INFO L225 Difference]: With dead ends: 19868 [2021-04-15 02:30:25,540 INFO L226 Difference]: Without dead ends: 19864 [2021-04-15 02:30:25,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-04-15 02:30:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-04-15 02:30:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-04-15 02:30:25,927 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-04-15 02:30:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:25,927 INFO L480 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-04-15 02:30:25,927 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) [2021-04-15 02:30:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-04-15 02:30:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:25,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:25,933 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:26,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24575 [2021-04-15 02:30:26,133 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-04-15 02:30:26,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:26,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755109343] [2021-04-15 02:30:26,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:26,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755109343] [2021-04-15 02:30:26,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972898982] [2021-04-15 02:30:26,201 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 [2021-04-15 02:30:26,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:26,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:26,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:26,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:26,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:26,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722290689] [2021-04-15 02:30:26,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:26,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:26,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:26,259 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 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) [2021-04-15 02:30:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:26,477 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-04-15 02:30:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:26,477 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 22 [2021-04-15 02:30:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:26,510 INFO L225 Difference]: With dead ends: 18321 [2021-04-15 02:30:26,510 INFO L226 Difference]: Without dead ends: 18320 [2021-04-15 02:30:26,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-04-15 02:30:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-04-15 02:30:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-04-15 02:30:26,814 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-04-15 02:30:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:26,814 INFO L480 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-04-15 02:30:26,814 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) [2021-04-15 02:30:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-04-15 02:30:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:26,819 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:26,820 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:27,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24576 [2021-04-15 02:30:27,020 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-04-15 02:30:27,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:27,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426060614] [2021-04-15 02:30:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426060614] [2021-04-15 02:30:27,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635526645] [2021-04-15 02:30:27,081 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 [2021-04-15 02:30:27,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:27,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:27,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:27,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:27,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:27,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937956914] [2021-04-15 02:30:27,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:27,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:27,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:27,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:27,142 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 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) [2021-04-15 02:30:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:27,268 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-04-15 02:30:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:30:27,269 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 22 [2021-04-15 02:30:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:27,302 INFO L225 Difference]: With dead ends: 18502 [2021-04-15 02:30:27,302 INFO L226 Difference]: Without dead ends: 18502 [2021-04-15 02:30:27,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-04-15 02:30:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-04-15 02:30:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-04-15 02:30:27,635 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-04-15 02:30:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:27,635 INFO L480 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-04-15 02:30:27,635 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) [2021-04-15 02:30:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-04-15 02:30:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:27,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:27,641 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:27,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24577 [2021-04-15 02:30:27,841 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:27,842 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-04-15 02:30:27,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:27,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384530860] [2021-04-15 02:30:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:27,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384530860] [2021-04-15 02:30:27,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985957670] [2021-04-15 02:30:27,905 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 [2021-04-15 02:30:27,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:27,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:27,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:27,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:30:27,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005912704] [2021-04-15 02:30:27,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:27,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:27,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:27,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:27,965 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 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) [2021-04-15 02:30:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:28,199 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-04-15 02:30:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:28,200 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 22 [2021-04-15 02:30:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:28,231 INFO L225 Difference]: With dead ends: 18306 [2021-04-15 02:30:28,231 INFO L226 Difference]: Without dead ends: 18304 [2021-04-15 02:30:28,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-04-15 02:30:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-04-15 02:30:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-04-15 02:30:28,654 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-04-15 02:30:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:28,654 INFO L480 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-04-15 02:30:28,654 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) [2021-04-15 02:30:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-04-15 02:30:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:28,660 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:28,660 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:28,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24578 [2021-04-15 02:30:28,860 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:28,861 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-04-15 02:30:28,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:28,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883344666] [2021-04-15 02:30:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:28,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883344666] [2021-04-15 02:30:28,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242470785] [2021-04-15 02:30:28,930 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 [2021-04-15 02:30:28,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:28,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:28,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:28,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:28,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:30:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895367655] [2021-04-15 02:30:28,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:28,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:28,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:28,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:28,997 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 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) [2021-04-15 02:30:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:29,133 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-04-15 02:30:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:30:29,140 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 22 [2021-04-15 02:30:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:29,177 INFO L225 Difference]: With dead ends: 18305 [2021-04-15 02:30:29,177 INFO L226 Difference]: Without dead ends: 18305 [2021-04-15 02:30:29,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:30:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-04-15 02:30:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-04-15 02:30:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-04-15 02:30:29,498 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-04-15 02:30:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:29,498 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-04-15 02:30:29,498 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) [2021-04-15 02:30:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-04-15 02:30:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:29,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:29,504 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:29,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24579,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:29,704 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:29,704 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-04-15 02:30:29,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:29,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325883598] [2021-04-15 02:30:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:29,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325883598] [2021-04-15 02:30:29,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704459036] [2021-04-15 02:30:29,777 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 [2021-04-15 02:30:29,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:30:29,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:29,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:29,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:29,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529108942] [2021-04-15 02:30:29,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:29,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:29,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:29,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:29,841 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:30,088 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-04-15 02:30:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:30,129 INFO L225 Difference]: With dead ends: 17705 [2021-04-15 02:30:30,129 INFO L226 Difference]: Without dead ends: 17702 [2021-04-15 02:30:30,129 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-04-15 02:30:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-04-15 02:30:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-04-15 02:30:30,578 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-04-15 02:30:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:30,578 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-04-15 02:30:30,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-04-15 02:30:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:30,584 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:30,584 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:30,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24580 [2021-04-15 02:30:30,784 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-04-15 02:30:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:30,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666418014] [2021-04-15 02:30:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666418014] [2021-04-15 02:30:30,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716017819] [2021-04-15 02:30:30,855 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) [2021-04-15 02:30:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:30,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:30,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:30,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747364244] [2021-04-15 02:30:30,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:30,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:30,928 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:31,086 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-04-15 02:30:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:30:31,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:31,118 INFO L225 Difference]: With dead ends: 18492 [2021-04-15 02:30:31,118 INFO L226 Difference]: Without dead ends: 18492 [2021-04-15 02:30:31,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:30:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-04-15 02:30:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-04-15 02:30:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-04-15 02:30:31,414 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-04-15 02:30:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:31,414 INFO L480 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-04-15 02:30:31,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-04-15 02:30:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:31,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:31,419 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:31,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24581,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:31,620 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-04-15 02:30:31,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:31,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91151483] [2021-04-15 02:30:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91151483] [2021-04-15 02:30:31,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110613253] [2021-04-15 02:30:31,694 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 [2021-04-15 02:30:31,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:31,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:31,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:31,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364677856] [2021-04-15 02:30:31,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:31,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:31,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:31,756 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:32,109 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-04-15 02:30:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:32,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:32,146 INFO L225 Difference]: With dead ends: 18165 [2021-04-15 02:30:32,146 INFO L226 Difference]: Without dead ends: 18161 [2021-04-15 02:30:32,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-04-15 02:30:32,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-04-15 02:30:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-04-15 02:30:32,474 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-04-15 02:30:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:32,474 INFO L480 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-04-15 02:30:32,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-04-15 02:30:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:32,479 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:32,480 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:32,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24582,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:32,680 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-04-15 02:30:32,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:32,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339267076] [2021-04-15 02:30:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339267076] [2021-04-15 02:30:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982994475] [2021-04-15 02:30:32,749 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 [2021-04-15 02:30:32,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:30:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:32,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:32,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:32,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:32,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348410679] [2021-04-15 02:30:32,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:32,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:32,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:32,817 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:32,997 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-04-15 02:30:32,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:30:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:33,047 INFO L225 Difference]: With dead ends: 23520 [2021-04-15 02:30:33,047 INFO L226 Difference]: Without dead ends: 23520 [2021-04-15 02:30:33,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:30:33,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-04-15 02:30:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-04-15 02:30:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-04-15 02:30:33,516 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-04-15 02:30:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:33,516 INFO L480 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-04-15 02:30:33,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-04-15 02:30:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:33,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:33,522 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:33,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24583,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:33,723 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-04-15 02:30:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:33,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822118702] [2021-04-15 02:30:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:33,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822118702] [2021-04-15 02:30:33,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908166779] [2021-04-15 02:30:33,798 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 [2021-04-15 02:30:33,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:33,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:33,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:33,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:33,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676999546] [2021-04-15 02:30:33,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:33,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:33,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:33,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:33,864 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:34,122 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-04-15 02:30:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:34,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:34,159 INFO L225 Difference]: With dead ends: 19410 [2021-04-15 02:30:34,159 INFO L226 Difference]: Without dead ends: 19405 [2021-04-15 02:30:34,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-04-15 02:30:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-04-15 02:30:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-04-15 02:30:34,496 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-04-15 02:30:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:34,496 INFO L480 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-04-15 02:30:34,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-04-15 02:30:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:34,502 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:34,502 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:34,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24584,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:34,703 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-04-15 02:30:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:34,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307475602] [2021-04-15 02:30:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307475602] [2021-04-15 02:30:34,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573630844] [2021-04-15 02:30:34,786 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 [2021-04-15 02:30:34,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:30:34,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:34,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:34,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:34,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853139343] [2021-04-15 02:30:34,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:34,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:34,854 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:35,195 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-04-15 02:30:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:30:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:35,229 INFO L225 Difference]: With dead ends: 20745 [2021-04-15 02:30:35,229 INFO L226 Difference]: Without dead ends: 20745 [2021-04-15 02:30:35,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-04-15 02:30:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-04-15 02:30:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-04-15 02:30:35,555 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-04-15 02:30:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:35,555 INFO L480 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-04-15 02:30:35,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-04-15 02:30:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:35,561 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:35,561 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:35,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24585,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:35,761 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-04-15 02:30:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:35,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272810769] [2021-04-15 02:30:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:35,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272810769] [2021-04-15 02:30:35,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491010693] [2021-04-15 02:30:35,839 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 [2021-04-15 02:30:35,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:30:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:35,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:35,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:35,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387864537] [2021-04-15 02:30:35,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:35,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:35,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:35,904 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:36,167 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-04-15 02:30:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:36,206 INFO L225 Difference]: With dead ends: 20239 [2021-04-15 02:30:36,206 INFO L226 Difference]: Without dead ends: 20233 [2021-04-15 02:30:36,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-04-15 02:30:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-04-15 02:30:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-04-15 02:30:36,636 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-04-15 02:30:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:36,636 INFO L480 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-04-15 02:30:36,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-04-15 02:30:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:36,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:36,642 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:36,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24586 [2021-04-15 02:30:36,843 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:36,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-04-15 02:30:36,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:36,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240372959] [2021-04-15 02:30:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:36,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240372959] [2021-04-15 02:30:36,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622954476] [2021-04-15 02:30:36,922 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 [2021-04-15 02:30:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:36,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:36,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887542825] [2021-04-15 02:30:36,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:36,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:36,989 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:37,268 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-04-15 02:30:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:37,307 INFO L225 Difference]: With dead ends: 20573 [2021-04-15 02:30:37,308 INFO L226 Difference]: Without dead ends: 20573 [2021-04-15 02:30:37,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:30:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-04-15 02:30:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-04-15 02:30:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-04-15 02:30:37,646 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-04-15 02:30:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:37,646 INFO L480 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-04-15 02:30:37,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-04-15 02:30:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:37,651 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:37,651 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:37,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24587 [2021-04-15 02:30:37,852 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-04-15 02:30:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:37,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286133653] [2021-04-15 02:30:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286133653] [2021-04-15 02:30:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358890754] [2021-04-15 02:30:37,943 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 [2021-04-15 02:30:37,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:37,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:37,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:37,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:38,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:38,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:38,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182111265] [2021-04-15 02:30:38,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:38,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:38,020 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:38,358 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-04-15 02:30:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:38,401 INFO L225 Difference]: With dead ends: 20348 [2021-04-15 02:30:38,401 INFO L226 Difference]: Without dead ends: 20341 [2021-04-15 02:30:38,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:30:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-04-15 02:30:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-04-15 02:30:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-04-15 02:30:38,776 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-04-15 02:30:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:38,776 INFO L480 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-04-15 02:30:38,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-04-15 02:30:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:38,782 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:38,782 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:38,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24588 [2021-04-15 02:30:38,982 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:38,983 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-04-15 02:30:38,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:38,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107158741] [2021-04-15 02:30:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107158741] [2021-04-15 02:30:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044597530] [2021-04-15 02:30:39,066 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 [2021-04-15 02:30:39,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:39,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:39,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:39,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:39,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:39,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197534883] [2021-04-15 02:30:39,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:39,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:39,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:39,137 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:39,550 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-04-15 02:30:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:30:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:39,588 INFO L225 Difference]: With dead ends: 21105 [2021-04-15 02:30:39,588 INFO L226 Difference]: Without dead ends: 21105 [2021-04-15 02:30:39,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:30:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-04-15 02:30:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-04-15 02:30:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-04-15 02:30:39,999 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-04-15 02:30:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:39,999 INFO L480 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-04-15 02:30:39,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-04-15 02:30:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:40,005 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:40,005 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:40,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24589 [2021-04-15 02:30:40,206 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-04-15 02:30:40,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:40,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569166162] [2021-04-15 02:30:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569166162] [2021-04-15 02:30:40,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440617901] [2021-04-15 02:30:40,264 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 [2021-04-15 02:30:40,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:40,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:40,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:40,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:40,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:30:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742102942] [2021-04-15 02:30:40,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:30:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:30:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:30:40,345 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 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) [2021-04-15 02:30:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:40,525 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-04-15 02:30:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:30:40,526 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 22 [2021-04-15 02:30:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:40,564 INFO L225 Difference]: With dead ends: 20897 [2021-04-15 02:30:40,564 INFO L226 Difference]: Without dead ends: 20897 [2021-04-15 02:30:40,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:30:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-04-15 02:30:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-04-15 02:30:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-04-15 02:30:40,918 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-04-15 02:30:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:40,918 INFO L480 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-04-15 02:30:40,918 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) [2021-04-15 02:30:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-04-15 02:30:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:40,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:40,924 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:41,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24590,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:41,125 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-04-15 02:30:41,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:41,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750202832] [2021-04-15 02:30:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:41,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750202832] [2021-04-15 02:30:41,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128974765] [2021-04-15 02:30:41,182 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 [2021-04-15 02:30:41,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:41,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:30:41,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:41,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:30:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732249898] [2021-04-15 02:30:41,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:30:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:30:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:30:41,271 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 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) [2021-04-15 02:30:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:41,550 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-04-15 02:30:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:41,550 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 22 [2021-04-15 02:30:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:41,607 INFO L225 Difference]: With dead ends: 25212 [2021-04-15 02:30:41,607 INFO L226 Difference]: Without dead ends: 25208 [2021-04-15 02:30:41,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-04-15 02:30:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-04-15 02:30:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-04-15 02:30:42,125 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-04-15 02:30:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:42,125 INFO L480 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-04-15 02:30:42,125 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) [2021-04-15 02:30:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-04-15 02:30:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:42,131 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:42,131 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:42,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24591 [2021-04-15 02:30:42,332 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-04-15 02:30:42,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:42,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491466181] [2021-04-15 02:30:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491466181] [2021-04-15 02:30:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908687850] [2021-04-15 02:30:42,394 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 [2021-04-15 02:30:42,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:42,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:42,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:42,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:42,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:42,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:30:42,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881982763] [2021-04-15 02:30:42,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:30:42,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:42,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:30:42,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:30:42,451 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 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) [2021-04-15 02:30:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:42,698 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-04-15 02:30:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:42,746 INFO L225 Difference]: With dead ends: 23865 [2021-04-15 02:30:42,746 INFO L226 Difference]: Without dead ends: 23861 [2021-04-15 02:30:42,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-04-15 02:30:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-04-15 02:30:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-04-15 02:30:43,178 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-04-15 02:30:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:43,178 INFO L480 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-04-15 02:30:43,178 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) [2021-04-15 02:30:43,178 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-04-15 02:30:43,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:43,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:43,184 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:43,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24592 [2021-04-15 02:30:43,398 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-04-15 02:30:43,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:43,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296625628] [2021-04-15 02:30:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296625628] [2021-04-15 02:30:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319468262] [2021-04-15 02:30:43,456 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 [2021-04-15 02:30:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:43,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:43,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:43,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:30:43,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791872898] [2021-04-15 02:30:43,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:30:43,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:30:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:30:43,519 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 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) [2021-04-15 02:30:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:43,876 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-04-15 02:30:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:43,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:43,934 INFO L225 Difference]: With dead ends: 26766 [2021-04-15 02:30:43,934 INFO L226 Difference]: Without dead ends: 26766 [2021-04-15 02:30:43,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:30:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-04-15 02:30:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-04-15 02:30:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-04-15 02:30:44,422 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-04-15 02:30:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:44,422 INFO L480 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-04-15 02:30:44,422 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) [2021-04-15 02:30:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-04-15 02:30:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:44,429 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:44,429 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:44,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24593,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:44,629 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:44,630 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-04-15 02:30:44,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:44,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165435509] [2021-04-15 02:30:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:44,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165435509] [2021-04-15 02:30:44,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737537760] [2021-04-15 02:30:44,713 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) [2021-04-15 02:30:44,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:44,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:44,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997478989] [2021-04-15 02:30:44,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:44,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:44,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:44,775 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 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) [2021-04-15 02:30:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:45,026 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-04-15 02:30:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:45,093 INFO L225 Difference]: With dead ends: 26395 [2021-04-15 02:30:45,094 INFO L226 Difference]: Without dead ends: 26391 [2021-04-15 02:30:45,094 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-04-15 02:30:45,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-04-15 02:30:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-04-15 02:30:45,672 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-04-15 02:30:45,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:45,672 INFO L480 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-04-15 02:30:45,672 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) [2021-04-15 02:30:45,672 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-04-15 02:30:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:45,679 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:45,679 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:45,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24594,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:45,880 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:45,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:45,880 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-04-15 02:30:45,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:45,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051495631] [2021-04-15 02:30:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:45,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051495631] [2021-04-15 02:30:45,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335496452] [2021-04-15 02:30:45,940 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 [2021-04-15 02:30:45,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:30:45,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:45,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:46,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:46,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:46,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331223932] [2021-04-15 02:30:46,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:46,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:46,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:46,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:46,002 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 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) [2021-04-15 02:30:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:46,239 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-04-15 02:30:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:46,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:46,302 INFO L225 Difference]: With dead ends: 28931 [2021-04-15 02:30:46,302 INFO L226 Difference]: Without dead ends: 28931 [2021-04-15 02:30:46,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:30:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-04-15 02:30:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-04-15 02:30:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-04-15 02:30:46,967 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-04-15 02:30:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:46,967 INFO L480 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-04-15 02:30:46,967 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) [2021-04-15 02:30:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-04-15 02:30:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:46,974 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:46,974 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:47,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24595,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:47,177 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-04-15 02:30:47,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:47,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142833262] [2021-04-15 02:30:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:47,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142833262] [2021-04-15 02:30:47,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296427716] [2021-04-15 02:30:47,244 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 [2021-04-15 02:30:47,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:47,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:47,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:47,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:47,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529051938] [2021-04-15 02:30:47,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:47,299 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 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) [2021-04-15 02:30:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:47,567 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-04-15 02:30:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:30:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:47,617 INFO L225 Difference]: With dead ends: 25641 [2021-04-15 02:30:47,617 INFO L226 Difference]: Without dead ends: 25636 [2021-04-15 02:30:47,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-04-15 02:30:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-04-15 02:30:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-04-15 02:30:48,121 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-04-15 02:30:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:48,121 INFO L480 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-04-15 02:30:48,121 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) [2021-04-15 02:30:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-04-15 02:30:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:48,128 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:48,128 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:48,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24596,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:48,329 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-04-15 02:30:48,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:48,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151515836] [2021-04-15 02:30:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:48,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151515836] [2021-04-15 02:30:48,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260230290] [2021-04-15 02:30:48,586 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 [2021-04-15 02:30:48,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:30:48,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:48,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:30:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402971998] [2021-04-15 02:30:48,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:30:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:48,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:30:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:30:48,647 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 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) [2021-04-15 02:30:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:48,933 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-04-15 02:30:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:48,993 INFO L225 Difference]: With dead ends: 28403 [2021-04-15 02:30:48,993 INFO L226 Difference]: Without dead ends: 28403 [2021-04-15 02:30:48,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 359.0ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-04-15 02:30:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-04-15 02:30:49,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-04-15 02:30:49,523 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-04-15 02:30:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:49,523 INFO L480 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-04-15 02:30:49,523 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) [2021-04-15 02:30:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-04-15 02:30:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:49,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:49,531 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:49,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24597 [2021-04-15 02:30:49,733 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-04-15 02:30:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:49,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602107587] [2021-04-15 02:30:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602107587] [2021-04-15 02:30:49,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914820723] [2021-04-15 02:30:49,800 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 [2021-04-15 02:30:49,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:49,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:49,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:49,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476292941] [2021-04-15 02:30:49,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:49,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:49,860 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 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) [2021-04-15 02:30:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:50,223 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-04-15 02:30:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:50,223 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 22 [2021-04-15 02:30:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:50,287 INFO L225 Difference]: With dead ends: 28254 [2021-04-15 02:30:50,287 INFO L226 Difference]: Without dead ends: 28250 [2021-04-15 02:30:50,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:30:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-04-15 02:30:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-04-15 02:30:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-04-15 02:30:50,830 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-04-15 02:30:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:50,830 INFO L480 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-04-15 02:30:50,830 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) [2021-04-15 02:30:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-04-15 02:30:50,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:50,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:50,838 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:51,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24598,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:51,038 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:51,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-04-15 02:30:51,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:51,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431330263] [2021-04-15 02:30:51,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:51,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431330263] [2021-04-15 02:30:51,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49935381] [2021-04-15 02:30:51,105 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 [2021-04-15 02:30:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:51,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:51,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:51,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122687136] [2021-04-15 02:30:51,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:51,165 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 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) [2021-04-15 02:30:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:51,496 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-04-15 02:30:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:30:51,496 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 22 [2021-04-15 02:30:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:51,557 INFO L225 Difference]: With dead ends: 30857 [2021-04-15 02:30:51,557 INFO L226 Difference]: Without dead ends: 30857 [2021-04-15 02:30:51,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-04-15 02:30:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-04-15 02:30:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-04-15 02:30:52,006 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-04-15 02:30:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:52,006 INFO L480 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-04-15 02:30:52,006 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) [2021-04-15 02:30:52,006 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-04-15 02:30:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:52,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:52,013 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:52,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24599 [2021-04-15 02:30:52,225 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-04-15 02:30:52,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:52,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444765514] [2021-04-15 02:30:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:52,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444765514] [2021-04-15 02:30:52,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320743145] [2021-04-15 02:30:52,296 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 [2021-04-15 02:30:52,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:52,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:52,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269553310] [2021-04-15 02:30:52,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:52,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:52,352 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 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) [2021-04-15 02:30:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:52,615 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-04-15 02:30:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:30:52,615 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 22 [2021-04-15 02:30:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:52,658 INFO L225 Difference]: With dead ends: 23497 [2021-04-15 02:30:52,658 INFO L226 Difference]: Without dead ends: 23492 [2021-04-15 02:30:52,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-04-15 02:30:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-04-15 02:30:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-04-15 02:30:53,112 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-04-15 02:30:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:53,112 INFO L480 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-04-15 02:30:53,112 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) [2021-04-15 02:30:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-04-15 02:30:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:53,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:53,118 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:53,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24600 [2021-04-15 02:30:53,319 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-04-15 02:30:53,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:53,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478703248] [2021-04-15 02:30:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478703248] [2021-04-15 02:30:53,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284256415] [2021-04-15 02:30:53,386 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 [2021-04-15 02:30:53,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:30:53,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:53,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:53,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:53,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397245264] [2021-04-15 02:30:53,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:53,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:53,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:53,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:53,449 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 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) [2021-04-15 02:30:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:53,727 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-04-15 02:30:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:30:53,728 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 22 [2021-04-15 02:30:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:53,783 INFO L225 Difference]: With dead ends: 26246 [2021-04-15 02:30:53,783 INFO L226 Difference]: Without dead ends: 26246 [2021-04-15 02:30:53,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:30:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-04-15 02:30:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-04-15 02:30:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-04-15 02:30:54,303 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-04-15 02:30:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:54,303 INFO L480 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-04-15 02:30:54,303 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) [2021-04-15 02:30:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-04-15 02:30:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:54,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:54,309 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:54,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24601 [2021-04-15 02:30:54,509 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-04-15 02:30:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:54,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634498716] [2021-04-15 02:30:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634498716] [2021-04-15 02:30:54,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199468514] [2021-04-15 02:30:54,585 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 [2021-04-15 02:30:54,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:30:54,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:54,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:54,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466484509] [2021-04-15 02:30:54,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:54,641 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 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) [2021-04-15 02:30:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:54,938 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-04-15 02:30:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:30:54,938 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 22 [2021-04-15 02:30:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:54,984 INFO L225 Difference]: With dead ends: 23615 [2021-04-15 02:30:54,984 INFO L226 Difference]: Without dead ends: 23609 [2021-04-15 02:30:54,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-04-15 02:30:55,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-04-15 02:30:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-04-15 02:30:55,385 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-04-15 02:30:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:55,385 INFO L480 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-04-15 02:30:55,386 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) [2021-04-15 02:30:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-04-15 02:30:55,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:55,392 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:55,392 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:55,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24602,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:55,593 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:55,593 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-04-15 02:30:55,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:55,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956943887] [2021-04-15 02:30:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:55,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956943887] [2021-04-15 02:30:55,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310023159] [2021-04-15 02:30:55,665 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 [2021-04-15 02:30:55,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:30:55,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:55,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:55,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:55,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:55,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:30:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183941913] [2021-04-15 02:30:55,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:30:55,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:55,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:30:55,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:30:55,729 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 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) [2021-04-15 02:30:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:56,291 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-04-15 02:30:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:56,291 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 22 [2021-04-15 02:30:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:56,338 INFO L225 Difference]: With dead ends: 24953 [2021-04-15 02:30:56,338 INFO L226 Difference]: Without dead ends: 24953 [2021-04-15 02:30:56,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:30:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-04-15 02:30:56,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-04-15 02:30:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-04-15 02:30:56,752 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-04-15 02:30:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:56,752 INFO L480 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-04-15 02:30:56,752 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) [2021-04-15 02:30:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-04-15 02:30:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:56,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:56,758 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:56,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24603,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:56,959 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-04-15 02:30:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:56,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387573966] [2021-04-15 02:30:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387573966] [2021-04-15 02:30:57,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180022853] [2021-04-15 02:30:57,029 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 [2021-04-15 02:30:57,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:30:57,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:57,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:57,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:57,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:57,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366868034] [2021-04-15 02:30:57,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:57,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:57,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:57,093 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:57,390 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-04-15 02:30:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:30:57,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:57,563 INFO L225 Difference]: With dead ends: 24826 [2021-04-15 02:30:57,564 INFO L226 Difference]: Without dead ends: 24822 [2021-04-15 02:30:57,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-04-15 02:30:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-04-15 02:30:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-04-15 02:30:57,937 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-04-15 02:30:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:57,937 INFO L480 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-04-15 02:30:57,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-04-15 02:30:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:57,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:57,944 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:58,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24604 [2021-04-15 02:30:58,144 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:58,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-04-15 02:30:58,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:58,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204767259] [2021-04-15 02:30:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:58,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204767259] [2021-04-15 02:30:58,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944780281] [2021-04-15 02:30:58,210 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 [2021-04-15 02:30:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:58,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:58,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916911288] [2021-04-15 02:30:58,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:58,277 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:58,501 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-04-15 02:30:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:30:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:58,553 INFO L225 Difference]: With dead ends: 25900 [2021-04-15 02:30:58,553 INFO L226 Difference]: Without dead ends: 25900 [2021-04-15 02:30:58,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:30:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-04-15 02:30:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-04-15 02:30:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-04-15 02:30:59,017 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-04-15 02:30:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:59,017 INFO L480 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-04-15 02:30:59,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-04-15 02:30:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:30:59,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:59,023 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:59,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24605,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:30:59,237 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-04-15 02:30:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:59,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805292551] [2021-04-15 02:30:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805292551] [2021-04-15 02:30:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758037969] [2021-04-15 02:30:59,314 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 [2021-04-15 02:30:59,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:59,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:59,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:30:59,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:59,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:59,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:30:59,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458236002] [2021-04-15 02:30:59,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:30:59,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:59,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:30:59,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:30:59,379 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:59,678 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-04-15 02:30:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:30:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:30:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:59,710 INFO L225 Difference]: With dead ends: 19111 [2021-04-15 02:30:59,710 INFO L226 Difference]: Without dead ends: 19106 [2021-04-15 02:30:59,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:30:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-04-15 02:30:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-04-15 02:31:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-04-15 02:31:00,055 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-04-15 02:31:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:00,055 INFO L480 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-04-15 02:31:00,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-04-15 02:31:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:00,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:00,061 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:00,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24606 [2021-04-15 02:31:00,262 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:00,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-04-15 02:31:00,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:00,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782397229] [2021-04-15 02:31:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:00,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782397229] [2021-04-15 02:31:00,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126295883] [2021-04-15 02:31:00,331 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 [2021-04-15 02:31:00,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:00,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:00,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:00,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:00,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:00,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18294298] [2021-04-15 02:31:00,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:00,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:00,400 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:00,667 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-04-15 02:31:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:00,705 INFO L225 Difference]: With dead ends: 22104 [2021-04-15 02:31:00,705 INFO L226 Difference]: Without dead ends: 22104 [2021-04-15 02:31:00,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-04-15 02:31:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-04-15 02:31:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-04-15 02:31:01,025 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-04-15 02:31:01,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:01,025 INFO L480 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-04-15 02:31:01,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-04-15 02:31:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:01,031 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:01,031 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:01,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24607,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:01,231 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:01,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-04-15 02:31:01,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:01,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299978016] [2021-04-15 02:31:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:01,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299978016] [2021-04-15 02:31:01,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119053158] [2021-04-15 02:31:01,310 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 [2021-04-15 02:31:01,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:01,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:01,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:01,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:01,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742066386] [2021-04-15 02:31:01,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:01,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:01,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:01,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:01,378 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:01,646 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-04-15 02:31:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:01,678 INFO L225 Difference]: With dead ends: 18689 [2021-04-15 02:31:01,678 INFO L226 Difference]: Without dead ends: 18683 [2021-04-15 02:31:01,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:31:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-04-15 02:31:01,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-04-15 02:31:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-04-15 02:31:01,979 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-04-15 02:31:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:01,979 INFO L480 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-04-15 02:31:01,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-04-15 02:31:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:01,985 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:01,985 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:02,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24608,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:02,186 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-04-15 02:31:02,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:02,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730468296] [2021-04-15 02:31:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730468296] [2021-04-15 02:31:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51350902] [2021-04-15 02:31:02,263 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 [2021-04-15 02:31:02,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:02,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:02,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375756027] [2021-04-15 02:31:02,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:02,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:02,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:02,340 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:02,674 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-04-15 02:31:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:02,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:02,707 INFO L225 Difference]: With dead ends: 19170 [2021-04-15 02:31:02,708 INFO L226 Difference]: Without dead ends: 19170 [2021-04-15 02:31:02,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:31:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-04-15 02:31:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-04-15 02:31:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-04-15 02:31:03,010 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-04-15 02:31:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:03,010 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-04-15 02:31:03,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-04-15 02:31:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:03,016 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:03,016 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:03,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24609,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:03,217 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-04-15 02:31:03,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:03,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26173924] [2021-04-15 02:31:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:03,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26173924] [2021-04-15 02:31:03,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289252399] [2021-04-15 02:31:03,296 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 [2021-04-15 02:31:03,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:03,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:03,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:03,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:03,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846288065] [2021-04-15 02:31:03,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:03,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:03,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:03,363 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:03,660 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-04-15 02:31:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:03,695 INFO L225 Difference]: With dead ends: 18240 [2021-04-15 02:31:03,695 INFO L226 Difference]: Without dead ends: 18233 [2021-04-15 02:31:03,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:31:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-04-15 02:31:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-04-15 02:31:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-04-15 02:31:04,027 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-04-15 02:31:04,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:04,027 INFO L480 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-04-15 02:31:04,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,028 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-04-15 02:31:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:04,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:04,033 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:04,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24610 [2021-04-15 02:31:04,234 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-04-15 02:31:04,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:04,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074353202] [2021-04-15 02:31:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074353202] [2021-04-15 02:31:04,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878912574] [2021-04-15 02:31:04,309 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 [2021-04-15 02:31:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:04,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:04,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:04,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:04,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450594686] [2021-04-15 02:31:04,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:04,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:04,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:04,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:04,378 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:04,757 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-04-15 02:31:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:31:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:04,787 INFO L225 Difference]: With dead ends: 18422 [2021-04-15 02:31:04,787 INFO L226 Difference]: Without dead ends: 18422 [2021-04-15 02:31:04,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:31:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-04-15 02:31:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-04-15 02:31:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-04-15 02:31:05,150 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-04-15 02:31:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:05,150 INFO L480 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-04-15 02:31:05,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-04-15 02:31:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:05,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:05,157 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:05,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24611 [2021-04-15 02:31:05,357 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:05,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:05,358 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-04-15 02:31:05,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:05,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951931374] [2021-04-15 02:31:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951931374] [2021-04-15 02:31:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945103077] [2021-04-15 02:31:05,429 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 [2021-04-15 02:31:05,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:05,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:05,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:05,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:05,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459514004] [2021-04-15 02:31:05,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:05,492 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 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) [2021-04-15 02:31:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:05,632 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-04-15 02:31:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:31:05,633 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 22 [2021-04-15 02:31:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:05,664 INFO L225 Difference]: With dead ends: 17724 [2021-04-15 02:31:05,664 INFO L226 Difference]: Without dead ends: 17724 [2021-04-15 02:31:05,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:05,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-04-15 02:31:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-04-15 02:31:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-04-15 02:31:05,955 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-04-15 02:31:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:05,955 INFO L480 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-04-15 02:31:05,956 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) [2021-04-15 02:31:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-04-15 02:31:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:05,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:05,961 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:06,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24612,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:06,162 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-04-15 02:31:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:06,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457419542] [2021-04-15 02:31:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:06,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457419542] [2021-04-15 02:31:06,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682449144] [2021-04-15 02:31:06,221 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 [2021-04-15 02:31:06,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:06,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659382739] [2021-04-15 02:31:06,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:06,291 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 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) [2021-04-15 02:31:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:06,508 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-04-15 02:31:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:06,508 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 22 [2021-04-15 02:31:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:06,539 INFO L225 Difference]: With dead ends: 17701 [2021-04-15 02:31:06,539 INFO L226 Difference]: Without dead ends: 17697 [2021-04-15 02:31:06,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-04-15 02:31:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-04-15 02:31:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-04-15 02:31:06,850 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-04-15 02:31:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:06,850 INFO L480 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-04-15 02:31:06,851 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) [2021-04-15 02:31:06,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-04-15 02:31:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:06,856 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:06,856 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:07,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24613 [2021-04-15 02:31:07,072 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-04-15 02:31:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:07,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393056177] [2021-04-15 02:31:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:07,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393056177] [2021-04-15 02:31:07,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145055669] [2021-04-15 02:31:07,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:31:07,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:07,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:07,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:07,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:07,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:07,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133126257] [2021-04-15 02:31:07,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:07,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:07,219 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 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) [2021-04-15 02:31:07,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:07,487 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-04-15 02:31:07,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:07,488 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 22 [2021-04-15 02:31:07,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:07,513 INFO L225 Difference]: With dead ends: 17251 [2021-04-15 02:31:07,513 INFO L226 Difference]: Without dead ends: 17250 [2021-04-15 02:31:07,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-04-15 02:31:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-04-15 02:31:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-04-15 02:31:07,782 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-04-15 02:31:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:07,782 INFO L480 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-04-15 02:31:07,782 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) [2021-04-15 02:31:07,782 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-04-15 02:31:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:07,787 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:07,787 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:07,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24614 [2021-04-15 02:31:07,988 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-04-15 02:31:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:07,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677671542] [2021-04-15 02:31:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677671542] [2021-04-15 02:31:08,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568844142] [2021-04-15 02:31:08,052 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) [2021-04-15 02:31:08,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:08,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:08,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443606537] [2021-04-15 02:31:08,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:08,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:08,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:08,128 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 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) [2021-04-15 02:31:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:08,260 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-04-15 02:31:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:31:08,261 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 22 [2021-04-15 02:31:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:08,296 INFO L225 Difference]: With dead ends: 17351 [2021-04-15 02:31:08,296 INFO L226 Difference]: Without dead ends: 17351 [2021-04-15 02:31:08,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:31:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-04-15 02:31:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-04-15 02:31:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-04-15 02:31:08,597 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-04-15 02:31:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:08,597 INFO L480 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-04-15 02:31:08,597 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) [2021-04-15 02:31:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-04-15 02:31:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:08,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:08,603 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:08,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24615,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:08,803 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-04-15 02:31:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:08,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034162665] [2021-04-15 02:31:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034162665] [2021-04-15 02:31:08,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415327891] [2021-04-15 02:31:08,866 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 [2021-04-15 02:31:08,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 02:31:08,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:08,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:08,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:31:08,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252917659] [2021-04-15 02:31:08,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:08,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:08,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:08,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:08,930 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 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) [2021-04-15 02:31:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:09,188 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-04-15 02:31:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:09,189 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 22 [2021-04-15 02:31:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:09,219 INFO L225 Difference]: With dead ends: 17271 [2021-04-15 02:31:09,219 INFO L226 Difference]: Without dead ends: 17269 [2021-04-15 02:31:09,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-04-15 02:31:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-04-15 02:31:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-04-15 02:31:09,511 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-04-15 02:31:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:09,512 INFO L480 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-04-15 02:31:09,512 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) [2021-04-15 02:31:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-04-15 02:31:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:09,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:09,517 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:09,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24616 [2021-04-15 02:31:09,717 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:09,718 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-04-15 02:31:09,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:09,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744368471] [2021-04-15 02:31:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744368471] [2021-04-15 02:31:09,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834687632] [2021-04-15 02:31:09,779 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 [2021-04-15 02:31:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:09,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:09,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:09,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:09,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:31:09,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948507754] [2021-04-15 02:31:09,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:09,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:09,846 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 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) [2021-04-15 02:31:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:09,989 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-04-15 02:31:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:31:09,990 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 22 [2021-04-15 02:31:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:10,021 INFO L225 Difference]: With dead ends: 17397 [2021-04-15 02:31:10,021 INFO L226 Difference]: Without dead ends: 17397 [2021-04-15 02:31:10,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:31:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-04-15 02:31:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-04-15 02:31:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-04-15 02:31:10,388 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-04-15 02:31:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:10,388 INFO L480 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-04-15 02:31:10,388 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) [2021-04-15 02:31:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-04-15 02:31:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:10,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:10,393 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:10,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24617,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:10,594 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-04-15 02:31:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:10,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29351857] [2021-04-15 02:31:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29351857] [2021-04-15 02:31:10,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941917714] [2021-04-15 02:31:10,661 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 [2021-04-15 02:31:10,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:10,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:10,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:10,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:31:10,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798520080] [2021-04-15 02:31:10,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:10,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:10,723 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 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) [2021-04-15 02:31:10,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:10,933 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-04-15 02:31:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:10,933 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 22 [2021-04-15 02:31:10,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:10,971 INFO L225 Difference]: With dead ends: 19691 [2021-04-15 02:31:10,971 INFO L226 Difference]: Without dead ends: 19688 [2021-04-15 02:31:10,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-04-15 02:31:11,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-04-15 02:31:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-04-15 02:31:11,283 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-04-15 02:31:11,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:11,283 INFO L480 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-04-15 02:31:11,283 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) [2021-04-15 02:31:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-04-15 02:31:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:11,288 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:11,288 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24618 [2021-04-15 02:31:11,489 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-04-15 02:31:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:11,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273845762] [2021-04-15 02:31:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:11,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273845762] [2021-04-15 02:31:11,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864963175] [2021-04-15 02:31:11,552 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 [2021-04-15 02:31:11,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:31:11,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:11,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:11,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:11,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:31:11,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715962553] [2021-04-15 02:31:11,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:11,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:11,621 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 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) [2021-04-15 02:31:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:11,788 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-04-15 02:31:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:31:11,788 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 22 [2021-04-15 02:31:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:11,841 INFO L225 Difference]: With dead ends: 26038 [2021-04-15 02:31:11,842 INFO L226 Difference]: Without dead ends: 26038 [2021-04-15 02:31:11,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-04-15 02:31:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-04-15 02:31:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-04-15 02:31:12,303 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-04-15 02:31:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:12,303 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-04-15 02:31:12,303 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) [2021-04-15 02:31:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-04-15 02:31:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:12,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:12,309 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:12,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24619,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:12,510 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-04-15 02:31:12,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:12,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527896915] [2021-04-15 02:31:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527896915] [2021-04-15 02:31:12,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582858556] [2021-04-15 02:31:12,583 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 [2021-04-15 02:31:12,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:12,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:12,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520077207] [2021-04-15 02:31:12,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:12,645 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:12,906 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-04-15 02:31:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:31:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:12,963 INFO L225 Difference]: With dead ends: 28515 [2021-04-15 02:31:12,963 INFO L226 Difference]: Without dead ends: 28511 [2021-04-15 02:31:12,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-04-15 02:31:13,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-04-15 02:31:13,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-04-15 02:31:13,621 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-04-15 02:31:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:13,621 INFO L480 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-04-15 02:31:13,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-04-15 02:31:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:13,627 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:13,627 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:13,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24620 [2021-04-15 02:31:13,827 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-04-15 02:31:13,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:13,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513992391] [2021-04-15 02:31:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513992391] [2021-04-15 02:31:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233909389] [2021-04-15 02:31:13,896 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 [2021-04-15 02:31:13,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:31:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:13,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:13,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:13,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225675908] [2021-04-15 02:31:13,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:13,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:13,964 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:14,176 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-04-15 02:31:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:14,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:14,233 INFO L225 Difference]: With dead ends: 26560 [2021-04-15 02:31:14,233 INFO L226 Difference]: Without dead ends: 26560 [2021-04-15 02:31:14,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:31:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-04-15 02:31:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-04-15 02:31:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-04-15 02:31:14,721 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-04-15 02:31:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:14,722 INFO L480 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-04-15 02:31:14,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-04-15 02:31:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:14,727 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:14,727 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:14,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24621,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:14,928 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-04-15 02:31:14,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:14,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678623527] [2021-04-15 02:31:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678623527] [2021-04-15 02:31:15,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824765511] [2021-04-15 02:31:15,003 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 [2021-04-15 02:31:15,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:15,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:15,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:15,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:15,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:15,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796289843] [2021-04-15 02:31:15,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:15,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:15,068 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:15,321 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-04-15 02:31:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:15,373 INFO L225 Difference]: With dead ends: 26225 [2021-04-15 02:31:15,373 INFO L226 Difference]: Without dead ends: 26220 [2021-04-15 02:31:15,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-04-15 02:31:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-04-15 02:31:15,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-04-15 02:31:15,802 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-04-15 02:31:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:15,802 INFO L480 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-04-15 02:31:15,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-04-15 02:31:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:15,808 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:15,808 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:16,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24622 [2021-04-15 02:31:16,009 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-04-15 02:31:16,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:16,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42143321] [2021-04-15 02:31:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:16,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42143321] [2021-04-15 02:31:16,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228869110] [2021-04-15 02:31:16,080 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 [2021-04-15 02:31:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:16,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:16,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:16,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12358457] [2021-04-15 02:31:16,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:16,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:16,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:16,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:16,148 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:16,461 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-04-15 02:31:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:16,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:16,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:16,516 INFO L225 Difference]: With dead ends: 28702 [2021-04-15 02:31:16,516 INFO L226 Difference]: Without dead ends: 28702 [2021-04-15 02:31:16,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:31:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-04-15 02:31:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-04-15 02:31:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-04-15 02:31:16,973 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-04-15 02:31:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:16,973 INFO L480 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-04-15 02:31:16,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-04-15 02:31:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:16,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:16,981 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:17,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24623 [2021-04-15 02:31:17,181 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:17,182 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-04-15 02:31:17,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:17,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451242384] [2021-04-15 02:31:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:17,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451242384] [2021-04-15 02:31:17,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003127896] [2021-04-15 02:31:17,259 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 [2021-04-15 02:31:17,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:17,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:17,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:17,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:17,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226619815] [2021-04-15 02:31:17,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:17,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:17,322 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:17,551 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-04-15 02:31:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:17,608 INFO L225 Difference]: With dead ends: 28805 [2021-04-15 02:31:17,608 INFO L226 Difference]: Without dead ends: 28799 [2021-04-15 02:31:17,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-04-15 02:31:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-04-15 02:31:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-04-15 02:31:18,076 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-04-15 02:31:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:18,076 INFO L480 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-04-15 02:31:18,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-04-15 02:31:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:18,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:18,082 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:18,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24624,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:18,283 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-04-15 02:31:18,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:18,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756015150] [2021-04-15 02:31:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:18,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756015150] [2021-04-15 02:31:18,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133597541] [2021-04-15 02:31:18,362 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 [2021-04-15 02:31:18,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:18,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:18,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:18,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:18,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958542919] [2021-04-15 02:31:18,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:18,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:18,437 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:18,701 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-04-15 02:31:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:18,758 INFO L225 Difference]: With dead ends: 29601 [2021-04-15 02:31:18,758 INFO L226 Difference]: Without dead ends: 29601 [2021-04-15 02:31:18,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-04-15 02:31:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-04-15 02:31:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-04-15 02:31:19,412 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-04-15 02:31:19,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:19,412 INFO L480 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-04-15 02:31:19,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-04-15 02:31:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:19,419 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:19,419 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:19,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24625 [2021-04-15 02:31:19,628 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:19,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:19,628 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-04-15 02:31:19,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:19,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718377082] [2021-04-15 02:31:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:19,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718377082] [2021-04-15 02:31:19,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744616480] [2021-04-15 02:31:19,709 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 [2021-04-15 02:31:19,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:19,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:19,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:19,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:19,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790154309] [2021-04-15 02:31:19,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:19,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:19,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:19,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:19,771 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:20,025 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-04-15 02:31:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:20,088 INFO L225 Difference]: With dead ends: 29739 [2021-04-15 02:31:20,088 INFO L226 Difference]: Without dead ends: 29732 [2021-04-15 02:31:20,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:20,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-04-15 02:31:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-04-15 02:31:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-04-15 02:31:20,585 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-04-15 02:31:20,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:20,585 INFO L480 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-04-15 02:31:20,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-04-15 02:31:20,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:20,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:20,593 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:20,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24626 [2021-04-15 02:31:20,793 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-04-15 02:31:20,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:20,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864257101] [2021-04-15 02:31:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864257101] [2021-04-15 02:31:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106071484] [2021-04-15 02:31:20,876 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 [2021-04-15 02:31:20,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:20,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:20,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:20,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:20,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:20,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422069683] [2021-04-15 02:31:20,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:20,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:20,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:20,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:20,948 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:21,374 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-04-15 02:31:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:21,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:21,440 INFO L225 Difference]: With dead ends: 29939 [2021-04-15 02:31:21,440 INFO L226 Difference]: Without dead ends: 29939 [2021-04-15 02:31:21,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:31:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-04-15 02:31:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-04-15 02:31:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-04-15 02:31:22,187 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-04-15 02:31:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:22,187 INFO L480 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-04-15 02:31:22,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-04-15 02:31:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:22,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:22,194 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:22,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24627,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:22,395 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-04-15 02:31:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:22,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18038627] [2021-04-15 02:31:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18038627] [2021-04-15 02:31:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263023663] [2021-04-15 02:31:22,482 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 [2021-04-15 02:31:22,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:31:22,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:22,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:22,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:22,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:22,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:22,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775964592] [2021-04-15 02:31:22,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:22,549 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:22,795 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-04-15 02:31:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:31:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:22,857 INFO L225 Difference]: With dead ends: 29973 [2021-04-15 02:31:22,857 INFO L226 Difference]: Without dead ends: 29965 [2021-04-15 02:31:22,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:31:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-04-15 02:31:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-04-15 02:31:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-04-15 02:31:23,379 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-04-15 02:31:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:23,379 INFO L480 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-04-15 02:31:23,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-04-15 02:31:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:23,387 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:23,387 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:23,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24628,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:23,588 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-04-15 02:31:23,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:23,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211092511] [2021-04-15 02:31:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211092511] [2021-04-15 02:31:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868660857] [2021-04-15 02:31:23,672 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 [2021-04-15 02:31:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356942167] [2021-04-15 02:31:23,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:23,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:23,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:23,744 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:24,056 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-04-15 02:31:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:24,430 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-04-15 02:31:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:31:24,431 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:24,496 INFO L225 Difference]: With dead ends: 30267 [2021-04-15 02:31:24,496 INFO L226 Difference]: Without dead ends: 30267 [2021-04-15 02:31:24,497 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 555.0ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:31:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-04-15 02:31:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-04-15 02:31:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-04-15 02:31:25,033 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-04-15 02:31:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:25,033 INFO L480 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-04-15 02:31:25,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-04-15 02:31:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:25,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:25,041 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:25,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24629,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:25,241 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-04-15 02:31:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:25,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524313489] [2021-04-15 02:31:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524313489] [2021-04-15 02:31:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553757972] [2021-04-15 02:31:25,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:31:25,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:25,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:25,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:25,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:31:25,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:25,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:31:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252635811] [2021-04-15 02:31:25,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:31:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:31:25,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:31:25,362 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 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) [2021-04-15 02:31:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:25,643 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-04-15 02:31:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:31:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:25,707 INFO L225 Difference]: With dead ends: 30158 [2021-04-15 02:31:25,707 INFO L226 Difference]: Without dead ends: 30158 [2021-04-15 02:31:25,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:31:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-04-15 02:31:26,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-04-15 02:31:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-04-15 02:31:26,270 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-04-15 02:31:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-04-15 02:31:26,270 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) [2021-04-15 02:31:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-04-15 02:31:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:26,277 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:26,277 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:26,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24630 [2021-04-15 02:31:26,478 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-04-15 02:31:26,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:26,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930522519] [2021-04-15 02:31:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930522519] [2021-04-15 02:31:26,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965372357] [2021-04-15 02:31:26,534 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 [2021-04-15 02:31:26,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:26,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:31:26,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:26,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:31:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585051154] [2021-04-15 02:31:26,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:31:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:31:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:31:26,595 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 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) [2021-04-15 02:31:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:26,911 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-04-15 02:31:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:26,978 INFO L225 Difference]: With dead ends: 31233 [2021-04-15 02:31:26,979 INFO L226 Difference]: Without dead ends: 31229 [2021-04-15 02:31:26,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-04-15 02:31:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-04-15 02:31:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-04-15 02:31:27,586 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-04-15 02:31:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:27,586 INFO L480 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-04-15 02:31:27,586 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) [2021-04-15 02:31:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-04-15 02:31:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:27,594 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:27,594 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:27,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24631,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:27,794 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-04-15 02:31:27,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:27,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59631855] [2021-04-15 02:31:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59631855] [2021-04-15 02:31:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963724892] [2021-04-15 02:31:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:31:27,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:27,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:27,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:27,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:27,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067141041] [2021-04-15 02:31:27,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:27,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:27,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:27,919 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 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) [2021-04-15 02:31:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:28,176 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-04-15 02:31:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:28,230 INFO L225 Difference]: With dead ends: 28956 [2021-04-15 02:31:28,230 INFO L226 Difference]: Without dead ends: 28951 [2021-04-15 02:31:28,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-04-15 02:31:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-04-15 02:31:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-04-15 02:31:28,807 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-04-15 02:31:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:28,807 INFO L480 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-04-15 02:31:28,808 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) [2021-04-15 02:31:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-04-15 02:31:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:28,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:28,815 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:29,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24632 [2021-04-15 02:31:29,015 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:29,016 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-04-15 02:31:29,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:29,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845306024] [2021-04-15 02:31:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845306024] [2021-04-15 02:31:29,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188430999] [2021-04-15 02:31:29,081 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 [2021-04-15 02:31:29,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:29,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:29,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:29,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:29,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:29,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854146665] [2021-04-15 02:31:29,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:29,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:29,149 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 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) [2021-04-15 02:31:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:29,471 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-04-15 02:31:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:29,549 INFO L225 Difference]: With dead ends: 34766 [2021-04-15 02:31:29,549 INFO L226 Difference]: Without dead ends: 34766 [2021-04-15 02:31:29,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-04-15 02:31:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-04-15 02:31:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-04-15 02:31:30,255 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-04-15 02:31:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:30,255 INFO L480 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-04-15 02:31:30,255 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) [2021-04-15 02:31:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-04-15 02:31:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:30,263 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:30,263 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:30,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24633 [2021-04-15 02:31:30,464 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:30,464 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-04-15 02:31:30,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:30,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828426296] [2021-04-15 02:31:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828426296] [2021-04-15 02:31:30,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931173251] [2021-04-15 02:31:30,541 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 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 [2021-04-15 02:31:30,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:31:30,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:30,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:30,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:30,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:31:30,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761177630] [2021-04-15 02:31:30,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:30,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:30,599 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 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) [2021-04-15 02:31:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:30,893 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-04-15 02:31:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:30,894 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 22 [2021-04-15 02:31:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:30,961 INFO L225 Difference]: With dead ends: 33998 [2021-04-15 02:31:30,961 INFO L226 Difference]: Without dead ends: 33993 [2021-04-15 02:31:30,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:30,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-04-15 02:31:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-04-15 02:31:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-04-15 02:31:31,689 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-04-15 02:31:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:31,689 INFO L480 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-04-15 02:31:31,689 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) [2021-04-15 02:31:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-04-15 02:31:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:31,698 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:31,698 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:31,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24634,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:31,898 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-04-15 02:31:31,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:31,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061663632] [2021-04-15 02:31:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:31,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061663632] [2021-04-15 02:31:31,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948763834] [2021-04-15 02:31:31,971 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 [2021-04-15 02:31:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:32,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:32,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:31:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561067137] [2021-04-15 02:31:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:32,034 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 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) [2021-04-15 02:31:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:32,350 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-04-15 02:31:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:31:32,350 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 22 [2021-04-15 02:31:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:32,428 INFO L225 Difference]: With dead ends: 40272 [2021-04-15 02:31:32,428 INFO L226 Difference]: Without dead ends: 40272 [2021-04-15 02:31:32,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-04-15 02:31:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-04-15 02:31:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-04-15 02:31:33,227 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-04-15 02:31:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:33,227 INFO L480 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-04-15 02:31:33,227 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) [2021-04-15 02:31:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-04-15 02:31:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:33,235 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:33,235 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:33,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24635 [2021-04-15 02:31:33,436 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-04-15 02:31:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:33,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748129604] [2021-04-15 02:31:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748129604] [2021-04-15 02:31:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58246058] [2021-04-15 02:31:33,511 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 [2021-04-15 02:31:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:33,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:33,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:33,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:31:33,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47526460] [2021-04-15 02:31:33,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:33,577 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 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) [2021-04-15 02:31:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:33,887 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-04-15 02:31:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:33,887 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 22 [2021-04-15 02:31:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:33,944 INFO L225 Difference]: With dead ends: 30323 [2021-04-15 02:31:33,944 INFO L226 Difference]: Without dead ends: 30317 [2021-04-15 02:31:33,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-04-15 02:31:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-04-15 02:31:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-04-15 02:31:34,605 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-04-15 02:31:34,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:34,606 INFO L480 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-04-15 02:31:34,606 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) [2021-04-15 02:31:34,606 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-04-15 02:31:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:34,614 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:34,614 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:34,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24636 [2021-04-15 02:31:34,814 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:34,815 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-04-15 02:31:34,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:34,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577781972] [2021-04-15 02:31:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:34,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577781972] [2021-04-15 02:31:34,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848560931] [2021-04-15 02:31:34,889 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 [2021-04-15 02:31:34,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:31:34,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:34,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:34,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:34,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:31:34,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230051800] [2021-04-15 02:31:34,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:34,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:34,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:34,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:34,954 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 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) [2021-04-15 02:31:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:35,364 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-04-15 02:31:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:31:35,364 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 22 [2021-04-15 02:31:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:35,447 INFO L225 Difference]: With dead ends: 34838 [2021-04-15 02:31:35,447 INFO L226 Difference]: Without dead ends: 34838 [2021-04-15 02:31:35,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:31:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-04-15 02:31:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-04-15 02:31:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-04-15 02:31:36,283 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-04-15 02:31:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:36,283 INFO L480 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-04-15 02:31:36,283 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) [2021-04-15 02:31:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-04-15 02:31:36,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:36,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:36,292 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:36,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24637,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:36,492 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:36,492 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-04-15 02:31:36,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:36,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839036850] [2021-04-15 02:31:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839036850] [2021-04-15 02:31:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775585723] [2021-04-15 02:31:36,565 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 [2021-04-15 02:31:36,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:36,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:36,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:36,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006308992] [2021-04-15 02:31:36,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:36,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:36,632 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:36,961 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-04-15 02:31:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:37,028 INFO L225 Difference]: With dead ends: 34116 [2021-04-15 02:31:37,028 INFO L226 Difference]: Without dead ends: 34111 [2021-04-15 02:31:37,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-04-15 02:31:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-04-15 02:31:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-04-15 02:31:37,796 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-04-15 02:31:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:37,796 INFO L480 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-04-15 02:31:37,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-04-15 02:31:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:37,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:37,804 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:38,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24638 [2021-04-15 02:31:38,005 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:38,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-04-15 02:31:38,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:38,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580170798] [2021-04-15 02:31:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580170798] [2021-04-15 02:31:38,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24616753] [2021-04-15 02:31:38,072 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 [2021-04-15 02:31:38,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:38,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:38,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:38,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:38,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:38,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37854681] [2021-04-15 02:31:38,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:38,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:38,141 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:38,460 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-04-15 02:31:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:31:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:38,538 INFO L225 Difference]: With dead ends: 36368 [2021-04-15 02:31:38,538 INFO L226 Difference]: Without dead ends: 36368 [2021-04-15 02:31:38,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:31:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-04-15 02:31:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-04-15 02:31:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-04-15 02:31:39,281 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-04-15 02:31:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:39,281 INFO L480 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-04-15 02:31:39,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-04-15 02:31:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:39,289 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:39,289 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:39,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24639,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:39,489 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-04-15 02:31:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642655388] [2021-04-15 02:31:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642655388] [2021-04-15 02:31:39,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197563624] [2021-04-15 02:31:39,563 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 [2021-04-15 02:31:39,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:39,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:39,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:39,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:39,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347905663] [2021-04-15 02:31:39,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:39,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:39,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:39,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:39,629 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:39,970 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-04-15 02:31:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:31:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:40,024 INFO L225 Difference]: With dead ends: 27914 [2021-04-15 02:31:40,024 INFO L226 Difference]: Without dead ends: 27908 [2021-04-15 02:31:40,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-04-15 02:31:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-04-15 02:31:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-04-15 02:31:40,636 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-04-15 02:31:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:40,636 INFO L480 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-04-15 02:31:40,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-04-15 02:31:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:40,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:40,644 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:40,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24640,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:40,845 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:40,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-04-15 02:31:40,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:40,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307477672] [2021-04-15 02:31:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:40,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307477672] [2021-04-15 02:31:40,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961540756] [2021-04-15 02:31:40,915 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 [2021-04-15 02:31:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:40,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:40,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320468821] [2021-04-15 02:31:40,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:40,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:40,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:40,992 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:41,339 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-04-15 02:31:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:41,407 INFO L225 Difference]: With dead ends: 32148 [2021-04-15 02:31:41,407 INFO L226 Difference]: Without dead ends: 32148 [2021-04-15 02:31:41,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:31:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-04-15 02:31:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-04-15 02:31:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-04-15 02:31:42,044 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-04-15 02:31:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:42,044 INFO L480 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-04-15 02:31:42,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-04-15 02:31:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:42,052 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:42,052 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:42,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24641 [2021-04-15 02:31:42,252 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-04-15 02:31:42,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:42,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755097023] [2021-04-15 02:31:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755097023] [2021-04-15 02:31:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064903567] [2021-04-15 02:31:42,339 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 [2021-04-15 02:31:42,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:42,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:42,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:42,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:42,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261371001] [2021-04-15 02:31:42,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:42,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:42,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:42,415 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:42,755 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-04-15 02:31:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:42,812 INFO L225 Difference]: With dead ends: 25874 [2021-04-15 02:31:42,812 INFO L226 Difference]: Without dead ends: 25867 [2021-04-15 02:31:42,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:31:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-04-15 02:31:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-04-15 02:31:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-04-15 02:31:43,435 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-04-15 02:31:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:43,435 INFO L480 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-04-15 02:31:43,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-04-15 02:31:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:43,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:43,443 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:43,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24642 [2021-04-15 02:31:43,644 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-04-15 02:31:43,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:43,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584975373] [2021-04-15 02:31:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:43,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584975373] [2021-04-15 02:31:43,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128098861] [2021-04-15 02:31:43,718 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 [2021-04-15 02:31:43,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:31:43,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:43,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:43,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:43,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:43,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119538473] [2021-04-15 02:31:43,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:43,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:43,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:43,795 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:44,244 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-04-15 02:31:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:31:44,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:44,305 INFO L225 Difference]: With dead ends: 27927 [2021-04-15 02:31:44,306 INFO L226 Difference]: Without dead ends: 27927 [2021-04-15 02:31:44,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:31:44,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-04-15 02:31:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-04-15 02:31:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-04-15 02:31:44,782 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-04-15 02:31:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:44,782 INFO L480 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-04-15 02:31:44,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-04-15 02:31:44,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:44,790 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:44,790 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:44,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24643 [2021-04-15 02:31:44,991 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:44,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-04-15 02:31:44,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:44,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333694764] [2021-04-15 02:31:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333694764] [2021-04-15 02:31:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25052740] [2021-04-15 02:31:45,243 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 [2021-04-15 02:31:45,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:45,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:45,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338207211] [2021-04-15 02:31:45,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:45,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:45,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:45,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:45,308 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:45,588 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-04-15 02:31:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:31:45,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:45,641 INFO L225 Difference]: With dead ends: 27147 [2021-04-15 02:31:45,642 INFO L226 Difference]: Without dead ends: 27142 [2021-04-15 02:31:45,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-04-15 02:31:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-04-15 02:31:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-04-15 02:31:46,105 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-04-15 02:31:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:46,105 INFO L480 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-04-15 02:31:46,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-04-15 02:31:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:46,113 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:46,113 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:46,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24644 [2021-04-15 02:31:46,314 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-04-15 02:31:46,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:46,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563569536] [2021-04-15 02:31:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563569536] [2021-04-15 02:31:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204080651] [2021-04-15 02:31:46,384 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 [2021-04-15 02:31:46,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:46,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:46,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958841962] [2021-04-15 02:31:46,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:46,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:46,456 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:46,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:46,792 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-04-15 02:31:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:46,849 INFO L225 Difference]: With dead ends: 27451 [2021-04-15 02:31:46,849 INFO L226 Difference]: Without dead ends: 27451 [2021-04-15 02:31:46,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:31:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-04-15 02:31:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-04-15 02:31:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-04-15 02:31:47,292 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-04-15 02:31:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:47,292 INFO L480 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-04-15 02:31:47,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-04-15 02:31:47,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:47,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:47,300 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:47,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24645 [2021-04-15 02:31:47,500 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-04-15 02:31:47,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:47,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008685720] [2021-04-15 02:31:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008685720] [2021-04-15 02:31:47,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153504280] [2021-04-15 02:31:47,582 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 [2021-04-15 02:31:47,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:31:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:47,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:47,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:47,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667911424] [2021-04-15 02:31:47,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:47,649 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:47,874 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-04-15 02:31:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:31:47,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:47,921 INFO L225 Difference]: With dead ends: 25024 [2021-04-15 02:31:47,921 INFO L226 Difference]: Without dead ends: 25018 [2021-04-15 02:31:47,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-04-15 02:31:48,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-04-15 02:31:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-04-15 02:31:48,373 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-04-15 02:31:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:48,373 INFO L480 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-04-15 02:31:48,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-04-15 02:31:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:48,381 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:48,381 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:48,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24646 [2021-04-15 02:31:48,581 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-04-15 02:31:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:48,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146793362] [2021-04-15 02:31:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:48,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146793362] [2021-04-15 02:31:48,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053700559] [2021-04-15 02:31:48,652 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 [2021-04-15 02:31:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:48,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:48,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:48,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621777479] [2021-04-15 02:31:48,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:48,719 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:48,976 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-04-15 02:31:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:49,033 INFO L225 Difference]: With dead ends: 25874 [2021-04-15 02:31:49,033 INFO L226 Difference]: Without dead ends: 25874 [2021-04-15 02:31:49,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:31:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-04-15 02:31:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-04-15 02:31:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-04-15 02:31:49,568 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-04-15 02:31:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:49,568 INFO L480 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-04-15 02:31:49,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-04-15 02:31:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:49,575 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:49,575 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:49,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24647 [2021-04-15 02:31:49,776 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-04-15 02:31:49,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:49,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023501061] [2021-04-15 02:31:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:49,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023501061] [2021-04-15 02:31:49,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423913401] [2021-04-15 02:31:49,855 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 [2021-04-15 02:31:49,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:49,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:49,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:49,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607927646] [2021-04-15 02:31:49,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:49,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:49,919 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:50,156 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-04-15 02:31:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:31:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:50,213 INFO L225 Difference]: With dead ends: 25438 [2021-04-15 02:31:50,213 INFO L226 Difference]: Without dead ends: 25431 [2021-04-15 02:31:50,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-04-15 02:31:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-04-15 02:31:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-04-15 02:31:50,667 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-04-15 02:31:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:50,667 INFO L480 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-04-15 02:31:50,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-04-15 02:31:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:50,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:50,674 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:50,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24648 [2021-04-15 02:31:50,875 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:50,875 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-04-15 02:31:50,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:50,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510332215] [2021-04-15 02:31:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510332215] [2021-04-15 02:31:51,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717386166] [2021-04-15 02:31:51,088 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 [2021-04-15 02:31:51,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:31:51,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:51,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:51,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:51,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:51,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:51,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955947577] [2021-04-15 02:31:51,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:51,166 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:51,569 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-04-15 02:31:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:31:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:51,622 INFO L225 Difference]: With dead ends: 25599 [2021-04-15 02:31:51,622 INFO L226 Difference]: Without dead ends: 25599 [2021-04-15 02:31:51,623 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:31:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-04-15 02:31:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-04-15 02:31:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-04-15 02:31:52,076 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-04-15 02:31:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:52,076 INFO L480 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-04-15 02:31:52,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-04-15 02:31:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:52,083 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:52,083 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:52,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24649 [2021-04-15 02:31:52,297 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-04-15 02:31:52,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:52,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026317347] [2021-04-15 02:31:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:52,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026317347] [2021-04-15 02:31:52,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231410749] [2021-04-15 02:31:52,381 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 [2021-04-15 02:31:52,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:52,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:52,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:52,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:52,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:52,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:52,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300696082] [2021-04-15 02:31:52,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:52,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:52,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:52,445 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:52,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:52,829 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-04-15 02:31:52,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:31:52,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:52,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:52,890 INFO L225 Difference]: With dead ends: 25442 [2021-04-15 02:31:52,891 INFO L226 Difference]: Without dead ends: 25434 [2021-04-15 02:31:52,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-04-15 02:31:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-04-15 02:31:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-04-15 02:31:53,334 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-04-15 02:31:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:53,334 INFO L480 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-04-15 02:31:53,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-04-15 02:31:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:53,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:53,341 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:53,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24650,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:53,542 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-04-15 02:31:53,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:53,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827748043] [2021-04-15 02:31:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827748043] [2021-04-15 02:31:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749701114] [2021-04-15 02:31:53,620 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 [2021-04-15 02:31:53,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:31:53,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:53,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:53,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:31:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557362783] [2021-04-15 02:31:53,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:31:53,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:31:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:53,691 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:54,166 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-04-15 02:31:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:31:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:31:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:54,213 INFO L225 Difference]: With dead ends: 25692 [2021-04-15 02:31:54,213 INFO L226 Difference]: Without dead ends: 25692 [2021-04-15 02:31:54,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:31:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-04-15 02:31:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-04-15 02:31:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-04-15 02:31:54,702 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-04-15 02:31:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:54,702 INFO L480 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-04-15 02:31:54,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-04-15 02:31:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:54,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:54,709 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:54,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24651,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:54,913 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-04-15 02:31:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:54,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417641435] [2021-04-15 02:31:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:54,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417641435] [2021-04-15 02:31:54,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257596667] [2021-04-15 02:31:54,978 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 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 [2021-04-15 02:31:54,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:31:54,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:55,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:55,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:55,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161597454] [2021-04-15 02:31:55,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:55,046 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 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) [2021-04-15 02:31:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:55,214 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-04-15 02:31:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:31:55,214 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 22 [2021-04-15 02:31:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:55,264 INFO L225 Difference]: With dead ends: 25353 [2021-04-15 02:31:55,264 INFO L226 Difference]: Without dead ends: 25353 [2021-04-15 02:31:55,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:31:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-04-15 02:31:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-04-15 02:31:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-04-15 02:31:55,795 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-04-15 02:31:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:55,795 INFO L480 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-04-15 02:31:55,795 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) [2021-04-15 02:31:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-04-15 02:31:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:55,802 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:55,802 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:56,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24652,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:56,002 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-04-15 02:31:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:56,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957517454] [2021-04-15 02:31:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:56,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957517454] [2021-04-15 02:31:56,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762484005] [2021-04-15 02:31:56,069 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 [2021-04-15 02:31:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:56,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:31:56,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:56,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:56,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500561373] [2021-04-15 02:31:56,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:56,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:56,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:56,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:56,127 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 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) [2021-04-15 02:31:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:56,398 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-04-15 02:31:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:56,399 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 22 [2021-04-15 02:31:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:56,452 INFO L225 Difference]: With dead ends: 25371 [2021-04-15 02:31:56,453 INFO L226 Difference]: Without dead ends: 25367 [2021-04-15 02:31:56,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-04-15 02:31:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-04-15 02:31:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-04-15 02:31:56,877 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-04-15 02:31:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:56,877 INFO L480 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-04-15 02:31:56,877 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) [2021-04-15 02:31:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-04-15 02:31:56,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:56,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:56,885 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:57,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24653 [2021-04-15 02:31:57,085 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-04-15 02:31:57,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:57,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833449092] [2021-04-15 02:31:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:57,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833449092] [2021-04-15 02:31:57,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733971060] [2021-04-15 02:31:57,151 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 [2021-04-15 02:31:57,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:31:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:57,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:57,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:57,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802060202] [2021-04-15 02:31:57,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:57,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:57,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:57,220 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 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) [2021-04-15 02:31:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:57,560 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-04-15 02:31:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:31:57,560 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 22 [2021-04-15 02:31:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:57,612 INFO L225 Difference]: With dead ends: 25448 [2021-04-15 02:31:57,612 INFO L226 Difference]: Without dead ends: 25447 [2021-04-15 02:31:57,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:31:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-04-15 02:31:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-04-15 02:31:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:58,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-04-15 02:31:58,055 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-04-15 02:31:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:58,055 INFO L480 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-04-15 02:31:58,055 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) [2021-04-15 02:31:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-04-15 02:31:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:58,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:58,062 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:58,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24654,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:31:58,263 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-04-15 02:31:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:58,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95973792] [2021-04-15 02:31:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:58,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95973792] [2021-04-15 02:31:58,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951424716] [2021-04-15 02:31:58,324 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 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 [2021-04-15 02:31:58,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:31:58,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:58,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:58,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:31:58,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295607559] [2021-04-15 02:31:58,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:31:58,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:31:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:31:58,388 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 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) [2021-04-15 02:31:58,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:58,572 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-04-15 02:31:58,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:31:58,573 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 22 [2021-04-15 02:31:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:58,625 INFO L225 Difference]: With dead ends: 25635 [2021-04-15 02:31:58,626 INFO L226 Difference]: Without dead ends: 25635 [2021-04-15 02:31:58,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:31:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-04-15 02:31:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-04-15 02:31:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:31:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-04-15 02:31:59,203 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-04-15 02:31:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:31:59,203 INFO L480 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-04-15 02:31:59,203 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) [2021-04-15 02:31:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-04-15 02:31:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:31:59,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:31:59,210 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:31:59,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24655 [2021-04-15 02:31:59,410 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:31:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:31:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-04-15 02:31:59,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:31:59,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923001776] [2021-04-15 02:31:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:31:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:31:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:59,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923001776] [2021-04-15 02:31:59,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435464856] [2021-04-15 02:31:59,474 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 [2021-04-15 02:31:59,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:31:59,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:31:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:31:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:31:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:31:59,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:31:59,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:31:59,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719293357] [2021-04-15 02:31:59,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:31:59,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:31:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:31:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:31:59,538 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 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) [2021-04-15 02:31:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:31:59,820 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-04-15 02:31:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:31:59,821 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 22 [2021-04-15 02:31:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:31:59,870 INFO L225 Difference]: With dead ends: 25479 [2021-04-15 02:31:59,870 INFO L226 Difference]: Without dead ends: 25477 [2021-04-15 02:31:59,870 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:31:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-04-15 02:32:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-04-15 02:32:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-04-15 02:32:00,297 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-04-15 02:32:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:00,297 INFO L480 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-04-15 02:32:00,297 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) [2021-04-15 02:32:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-04-15 02:32:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:00,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:00,304 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:00,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24656 [2021-04-15 02:32:00,505 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-04-15 02:32:00,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:00,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464962018] [2021-04-15 02:32:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464962018] [2021-04-15 02:32:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928336599] [2021-04-15 02:32:00,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:00,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:32:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:00,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:00,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:32:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697496914] [2021-04-15 02:32:00,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:00,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:00,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:00,637 INFO L87 Difference]: Start difference. First operand 25162 states and 86138 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) [2021-04-15 02:32:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:00,829 INFO L93 Difference]: Finished difference Result 25812 states and 87617 transitions. [2021-04-15 02:32:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:32:00,830 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 22 [2021-04-15 02:32:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:00,882 INFO L225 Difference]: With dead ends: 25812 [2021-04-15 02:32:00,882 INFO L226 Difference]: Without dead ends: 25812 [2021-04-15 02:32:00,882 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-04-15 02:32:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 25201. [2021-04-15 02:32:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 3.4220634920634923) internal successors, (86236), 25200 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 86236 transitions. [2021-04-15 02:32:01,448 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 86236 transitions. Word has length 22 [2021-04-15 02:32:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:01,448 INFO L480 AbstractCegarLoop]: Abstraction has 25201 states and 86236 transitions. [2021-04-15 02:32:01,448 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) [2021-04-15 02:32:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 86236 transitions. [2021-04-15 02:32:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:01,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:01,456 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:01,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24657,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:01,665 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 187302365, now seen corresponding path program 240 times [2021-04-15 02:32:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:01,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225216018] [2021-04-15 02:32:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:01,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225216018] [2021-04-15 02:32:01,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070603019] [2021-04-15 02:32:01,734 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:01,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:32:01,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:01,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:01,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:32:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087028748] [2021-04-15 02:32:01,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:01,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:01,799 INFO L87 Difference]: Start difference. First operand 25201 states and 86236 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) [2021-04-15 02:32:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:02,055 INFO L93 Difference]: Finished difference Result 30537 states and 103865 transitions. [2021-04-15 02:32:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:02,056 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 22 [2021-04-15 02:32:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:02,110 INFO L225 Difference]: With dead ends: 30537 [2021-04-15 02:32:02,110 INFO L226 Difference]: Without dead ends: 30534 [2021-04-15 02:32:02,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-04-15 02:32:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 25737. [2021-04-15 02:32:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25737 states, 25736 states have (on average 3.426173453528132) internal successors, (88176), 25736 states have internal predecessors, (88176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25737 states to 25737 states and 88176 transitions. [2021-04-15 02:32:02,756 INFO L78 Accepts]: Start accepts. Automaton has 25737 states and 88176 transitions. Word has length 22 [2021-04-15 02:32:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:02,756 INFO L480 AbstractCegarLoop]: Abstraction has 25737 states and 88176 transitions. [2021-04-15 02:32:02,756 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) [2021-04-15 02:32:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25737 states and 88176 transitions. [2021-04-15 02:32:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:02,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:02,763 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:02,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24658,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:02,964 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1585237046, now seen corresponding path program 241 times [2021-04-15 02:32:02,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:02,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817920597] [2021-04-15 02:32:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:03,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817920597] [2021-04-15 02:32:03,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537782049] [2021-04-15 02:32:03,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:03,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:03,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:32:03,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664477580] [2021-04-15 02:32:03,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:03,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:03,093 INFO L87 Difference]: Start difference. First operand 25737 states and 88176 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) [2021-04-15 02:32:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:03,295 INFO L93 Difference]: Finished difference Result 32821 states and 111446 transitions. [2021-04-15 02:32:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:32:03,295 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 22 [2021-04-15 02:32:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:03,361 INFO L225 Difference]: With dead ends: 32821 [2021-04-15 02:32:03,361 INFO L226 Difference]: Without dead ends: 32821 [2021-04-15 02:32:03,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32821 states. [2021-04-15 02:32:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32821 to 31903. [2021-04-15 02:32:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31903 states, 31902 states have (on average 3.4264622907654694) internal successors, (109311), 31902 states have internal predecessors, (109311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31903 states to 31903 states and 109311 transitions. [2021-04-15 02:32:04,152 INFO L78 Accepts]: Start accepts. Automaton has 31903 states and 109311 transitions. Word has length 22 [2021-04-15 02:32:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:04,152 INFO L480 AbstractCegarLoop]: Abstraction has 31903 states and 109311 transitions. [2021-04-15 02:32:04,152 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) [2021-04-15 02:32:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 31903 states and 109311 transitions. [2021-04-15 02:32:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:04,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:04,160 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:04,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24659 [2021-04-15 02:32:04,375 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:04,375 INFO L82 PathProgramCache]: Analyzing trace with hash -885783015, now seen corresponding path program 242 times [2021-04-15 02:32:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:04,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066135176] [2021-04-15 02:32:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:04,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066135176] [2021-04-15 02:32:04,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522806131] [2021-04-15 02:32:04,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:04,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:04,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:04,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:04,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:32:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309477242] [2021-04-15 02:32:04,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:04,522 INFO L87 Difference]: Start difference. First operand 31903 states and 109311 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) [2021-04-15 02:32:04,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:04,797 INFO L93 Difference]: Finished difference Result 35145 states and 119531 transitions. [2021-04-15 02:32:04,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:04,797 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 22 [2021-04-15 02:32:04,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:04,867 INFO L225 Difference]: With dead ends: 35145 [2021-04-15 02:32:04,867 INFO L226 Difference]: Without dead ends: 35141 [2021-04-15 02:32:04,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:04,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35141 states. [2021-04-15 02:32:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35141 to 31927. [2021-04-15 02:32:05,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31927 states, 31926 states have (on average 3.426423604585604) internal successors, (109392), 31926 states have internal predecessors, (109392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31927 states to 31927 states and 109392 transitions. [2021-04-15 02:32:05,464 INFO L78 Accepts]: Start accepts. Automaton has 31927 states and 109392 transitions. Word has length 22 [2021-04-15 02:32:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:05,464 INFO L480 AbstractCegarLoop]: Abstraction has 31927 states and 109392 transitions. [2021-04-15 02:32:05,464 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) [2021-04-15 02:32:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 31927 states and 109392 transitions. [2021-04-15 02:32:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:05,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:05,472 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:05,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24660,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:05,673 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1047381468, now seen corresponding path program 243 times [2021-04-15 02:32:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:05,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764853720] [2021-04-15 02:32:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:05,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764853720] [2021-04-15 02:32:05,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879975384] [2021-04-15 02:32:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:32:05,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:05,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:05,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:32:05,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982620984] [2021-04-15 02:32:05,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:05,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:05,990 INFO L87 Difference]: Start difference. First operand 31927 states and 109392 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) [2021-04-15 02:32:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:06,183 INFO L93 Difference]: Finished difference Result 34058 states and 115874 transitions. [2021-04-15 02:32:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:32:06,183 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 22 [2021-04-15 02:32:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:06,243 INFO L225 Difference]: With dead ends: 34058 [2021-04-15 02:32:06,243 INFO L226 Difference]: Without dead ends: 34058 [2021-04-15 02:32:06,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:32:06,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34058 states. [2021-04-15 02:32:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34058 to 33786. [2021-04-15 02:32:06,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33786 states, 33785 states have (on average 3.4163978096788514) internal successors, (115423), 33785 states have internal predecessors, (115423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 115423 transitions. [2021-04-15 02:32:06,798 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 115423 transitions. Word has length 22 [2021-04-15 02:32:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:06,799 INFO L480 AbstractCegarLoop]: Abstraction has 33786 states and 115423 transitions. [2021-04-15 02:32:06,799 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) [2021-04-15 02:32:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 115423 transitions. [2021-04-15 02:32:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:06,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:06,807 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:07,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24661 [2021-04-15 02:32:07,008 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:07,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:07,008 INFO L82 PathProgramCache]: Analyzing trace with hash 208308573, now seen corresponding path program 244 times [2021-04-15 02:32:07,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:07,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128772322] [2021-04-15 02:32:07,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128772322] [2021-04-15 02:32:07,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028084811] [2021-04-15 02:32:07,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:07,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:07,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:07,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:07,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:07,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798151009] [2021-04-15 02:32:07,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:07,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:07,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:07,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:07,160 INFO L87 Difference]: Start difference. First operand 33786 states and 115423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:07,536 INFO L93 Difference]: Finished difference Result 36935 states and 125285 transitions. [2021-04-15 02:32:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:07,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:07,603 INFO L225 Difference]: With dead ends: 36935 [2021-04-15 02:32:07,603 INFO L226 Difference]: Without dead ends: 36930 [2021-04-15 02:32:07,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36930 states. [2021-04-15 02:32:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36930 to 34131. [2021-04-15 02:32:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34131 states, 34130 states have (on average 3.4184295341341926) internal successors, (116671), 34130 states have internal predecessors, (116671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34131 states to 34131 states and 116671 transitions. [2021-04-15 02:32:08,167 INFO L78 Accepts]: Start accepts. Automaton has 34131 states and 116671 transitions. Word has length 22 [2021-04-15 02:32:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 34131 states and 116671 transitions. [2021-04-15 02:32:08,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 34131 states and 116671 transitions. [2021-04-15 02:32:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:08,175 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:08,175 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:08,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24662,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:08,376 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:08,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1553727734, now seen corresponding path program 245 times [2021-04-15 02:32:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:08,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8815692] [2021-04-15 02:32:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:08,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8815692] [2021-04-15 02:32:08,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187822097] [2021-04-15 02:32:08,588 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:08,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:32:08,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918019248] [2021-04-15 02:32:08,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:08,656 INFO L87 Difference]: Start difference. First operand 34131 states and 116671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:08,895 INFO L93 Difference]: Finished difference Result 34565 states and 117528 transitions. [2021-04-15 02:32:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:32:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:08,957 INFO L225 Difference]: With dead ends: 34565 [2021-04-15 02:32:08,957 INFO L226 Difference]: Without dead ends: 34565 [2021-04-15 02:32:08,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34565 states. [2021-04-15 02:32:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34565 to 34136. [2021-04-15 02:32:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178995166251647) internal successors, (116670), 34135 states have internal predecessors, (116670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116670 transitions. [2021-04-15 02:32:09,475 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116670 transitions. Word has length 22 [2021-04-15 02:32:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:09,475 INFO L480 AbstractCegarLoop]: Abstraction has 34136 states and 116670 transitions. [2021-04-15 02:32:09,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116670 transitions. [2021-04-15 02:32:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:09,483 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:09,483 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:09,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24663 [2021-04-15 02:32:09,683 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -234590567, now seen corresponding path program 246 times [2021-04-15 02:32:09,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:09,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941871482] [2021-04-15 02:32:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:09,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941871482] [2021-04-15 02:32:09,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973391276] [2021-04-15 02:32:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:09,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:09,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:09,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:09,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88886880] [2021-04-15 02:32:09,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:09,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:09,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:09,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:09,987 INFO L87 Difference]: Start difference. First operand 34136 states and 116670 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:10,247 INFO L93 Difference]: Finished difference Result 34685 states and 118130 transitions. [2021-04-15 02:32:10,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:10,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:10,310 INFO L225 Difference]: With dead ends: 34685 [2021-04-15 02:32:10,310 INFO L226 Difference]: Without dead ends: 34679 [2021-04-15 02:32:10,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-04-15 02:32:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34136. [2021-04-15 02:32:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178702211806065) internal successors, (116669), 34135 states have internal predecessors, (116669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116669 transitions. [2021-04-15 02:32:10,844 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116669 transitions. Word has length 22 [2021-04-15 02:32:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:10,844 INFO L480 AbstractCegarLoop]: Abstraction has 34136 states and 116669 transitions. [2021-04-15 02:32:10,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116669 transitions. [2021-04-15 02:32:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:10,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:10,852 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:11,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24664,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:11,057 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash -70592796, now seen corresponding path program 247 times [2021-04-15 02:32:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:11,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175306345] [2021-04-15 02:32:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:11,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175306345] [2021-04-15 02:32:11,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381563479] [2021-04-15 02:32:11,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:11,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:11,332 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-04-15 02:32:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:11,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:11,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701361257] [2021-04-15 02:32:11,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:11,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:11,360 INFO L87 Difference]: Start difference. First operand 34136 states and 116669 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:11,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:11,640 INFO L93 Difference]: Finished difference Result 34892 states and 118662 transitions. [2021-04-15 02:32:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:32:11,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:11,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:11,708 INFO L225 Difference]: With dead ends: 34892 [2021-04-15 02:32:11,708 INFO L226 Difference]: Without dead ends: 34892 [2021-04-15 02:32:11,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:32:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34892 states. [2021-04-15 02:32:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34892 to 34647. [2021-04-15 02:32:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.412861513594643) internal successors, (118242), 34646 states have internal predecessors, (118242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118242 transitions. [2021-04-15 02:32:12,253 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118242 transitions. Word has length 22 [2021-04-15 02:32:12,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:12,253 INFO L480 AbstractCegarLoop]: Abstraction has 34647 states and 118242 transitions. [2021-04-15 02:32:12,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118242 transitions. [2021-04-15 02:32:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:12,261 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:12,261 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:12,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24665 [2021-04-15 02:32:12,462 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1079562019, now seen corresponding path program 248 times [2021-04-15 02:32:12,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:12,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432172378] [2021-04-15 02:32:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432172378] [2021-04-15 02:32:12,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566571834] [2021-04-15 02:32:12,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:12,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:12,753 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-04-15 02:32:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:12,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:12,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:12,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158543871] [2021-04-15 02:32:12,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:12,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:12,765 INFO L87 Difference]: Start difference. First operand 34647 states and 118242 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:13,019 INFO L93 Difference]: Finished difference Result 35167 states and 119631 transitions. [2021-04-15 02:32:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:13,083 INFO L225 Difference]: With dead ends: 35167 [2021-04-15 02:32:13,083 INFO L226 Difference]: Without dead ends: 35160 [2021-04-15 02:32:13,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35160 states. [2021-04-15 02:32:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35160 to 34647. [2021-04-15 02:32:13,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.4128326502337933) internal successors, (118241), 34646 states have internal predecessors, (118241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118241 transitions. [2021-04-15 02:32:13,635 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118241 transitions. Word has length 22 [2021-04-15 02:32:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:13,635 INFO L480 AbstractCegarLoop]: Abstraction has 34647 states and 118241 transitions. [2021-04-15 02:32:13,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118241 transitions. [2021-04-15 02:32:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:13,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:13,644 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:13,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24666 [2021-04-15 02:32:13,844 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1338049974, now seen corresponding path program 249 times [2021-04-15 02:32:13,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:13,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647627429] [2021-04-15 02:32:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647627429] [2021-04-15 02:32:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728201654] [2021-04-15 02:32:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:13,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:13,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:13,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:13,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726966693] [2021-04-15 02:32:13,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:13,998 INFO L87 Difference]: Start difference. First operand 34647 states and 118241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:14,401 INFO L93 Difference]: Finished difference Result 35095 states and 119279 transitions. [2021-04-15 02:32:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:14,464 INFO L225 Difference]: With dead ends: 35095 [2021-04-15 02:32:14,464 INFO L226 Difference]: Without dead ends: 35095 [2021-04-15 02:32:14,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:32:14,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-04-15 02:32:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34867. [2021-04-15 02:32:14,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.410342453966615) internal successors, (118905), 34866 states have internal predecessors, (118905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118905 transitions. [2021-04-15 02:32:15,015 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118905 transitions. Word has length 22 [2021-04-15 02:32:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:15,015 INFO L480 AbstractCegarLoop]: Abstraction has 34867 states and 118905 transitions. [2021-04-15 02:32:15,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118905 transitions. [2021-04-15 02:32:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:15,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:15,023 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:15,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24667 [2021-04-15 02:32:15,224 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1503873255, now seen corresponding path program 250 times [2021-04-15 02:32:15,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:15,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56188745] [2021-04-15 02:32:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56188745] [2021-04-15 02:32:15,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210859727] [2021-04-15 02:32:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:15,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:15,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:15,513 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:32:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:15,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:15,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:15,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704985845] [2021-04-15 02:32:15,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:15,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:15,533 INFO L87 Difference]: Start difference. First operand 34867 states and 118905 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:15,801 INFO L93 Difference]: Finished difference Result 35358 states and 120222 transitions. [2021-04-15 02:32:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:32:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:15,862 INFO L225 Difference]: With dead ends: 35358 [2021-04-15 02:32:15,863 INFO L226 Difference]: Without dead ends: 35350 [2021-04-15 02:32:15,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-04-15 02:32:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34867. [2021-04-15 02:32:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.41031377272988) internal successors, (118904), 34866 states have internal predecessors, (118904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118904 transitions. [2021-04-15 02:32:16,405 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118904 transitions. Word has length 22 [2021-04-15 02:32:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:16,405 INFO L480 AbstractCegarLoop]: Abstraction has 34867 states and 118904 transitions. [2021-04-15 02:32:16,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118904 transitions. [2021-04-15 02:32:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:16,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:16,414 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:16,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24668 [2021-04-15 02:32:16,614 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1974516828, now seen corresponding path program 251 times [2021-04-15 02:32:16,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:16,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056724925] [2021-04-15 02:32:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056724925] [2021-04-15 02:32:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558453917] [2021-04-15 02:32:16,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:16,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:32:16,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:16,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:16,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:16,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983644330] [2021-04-15 02:32:16,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:16,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:16,762 INFO L87 Difference]: Start difference. First operand 34867 states and 118904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:17,285 INFO L93 Difference]: Finished difference Result 35266 states and 119729 transitions. [2021-04-15 02:32:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:32:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:17,347 INFO L225 Difference]: With dead ends: 35266 [2021-04-15 02:32:17,347 INFO L226 Difference]: Without dead ends: 35266 [2021-04-15 02:32:17,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 397.0ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:32:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35266 states. [2021-04-15 02:32:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35266 to 34965. [2021-04-15 02:32:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409163711245853) internal successors, (119198), 34964 states have internal predecessors, (119198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119198 transitions. [2021-04-15 02:32:17,884 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119198 transitions. Word has length 22 [2021-04-15 02:32:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:17,884 INFO L480 AbstractCegarLoop]: Abstraction has 34965 states and 119198 transitions. [2021-04-15 02:32:17,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119198 transitions. [2021-04-15 02:32:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:17,893 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:17,893 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:18,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24669 [2021-04-15 02:32:18,094 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1772619683, now seen corresponding path program 252 times [2021-04-15 02:32:18,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:18,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95845857] [2021-04-15 02:32:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:18,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95845857] [2021-04-15 02:32:18,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073168647] [2021-04-15 02:32:18,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:18,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:32:18,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:18,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:18,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:18,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:18,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669257780] [2021-04-15 02:32:18,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:18,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:18,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:18,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:18,249 INFO L87 Difference]: Start difference. First operand 34965 states and 119198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:18,582 INFO L93 Difference]: Finished difference Result 35421 states and 120437 transitions. [2021-04-15 02:32:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:32:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:18,645 INFO L225 Difference]: With dead ends: 35421 [2021-04-15 02:32:18,645 INFO L226 Difference]: Without dead ends: 35412 [2021-04-15 02:32:18,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35412 states. [2021-04-15 02:32:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35412 to 34965. [2021-04-15 02:32:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409135110399268) internal successors, (119197), 34964 states have internal predecessors, (119197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119197 transitions. [2021-04-15 02:32:19,175 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119197 transitions. Word has length 22 [2021-04-15 02:32:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:19,175 INFO L480 AbstractCegarLoop]: Abstraction has 34965 states and 119197 transitions. [2021-04-15 02:32:19,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119197 transitions. [2021-04-15 02:32:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:19,183 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:19,183 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:19,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24670,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,384 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -230152822, now seen corresponding path program 253 times [2021-04-15 02:32:19,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:19,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597627437] [2021-04-15 02:32:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:19,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597627437] [2021-04-15 02:32:19,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681569672] [2021-04-15 02:32:19,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:19,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:19,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:19,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904174185] [2021-04-15 02:32:19,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:19,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:19,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:19,541 INFO L87 Difference]: Start difference. First operand 34965 states and 119197 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:20,133 INFO L93 Difference]: Finished difference Result 35597 states and 120659 transitions. [2021-04-15 02:32:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:32:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:20,190 INFO L225 Difference]: With dead ends: 35597 [2021-04-15 02:32:20,190 INFO L226 Difference]: Without dead ends: 35597 [2021-04-15 02:32:20,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:32:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35597 states. [2021-04-15 02:32:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35597 to 35052. [2021-04-15 02:32:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35052 states, 35051 states have (on average 3.4081195971584264) internal successors, (119458), 35051 states have internal predecessors, (119458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35052 states to 35052 states and 119458 transitions. [2021-04-15 02:32:20,727 INFO L78 Accepts]: Start accepts. Automaton has 35052 states and 119458 transitions. Word has length 22 [2021-04-15 02:32:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:20,727 INFO L480 AbstractCegarLoop]: Abstraction has 35052 states and 119458 transitions. [2021-04-15 02:32:20,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 35052 states and 119458 transitions. [2021-04-15 02:32:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:20,735 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:20,735 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:20,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24671,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:20,936 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -599127143, now seen corresponding path program 254 times [2021-04-15 02:32:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:20,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919939923] [2021-04-15 02:32:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:21,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919939923] [2021-04-15 02:32:21,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813683094] [2021-04-15 02:32:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:21,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:21,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:21,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:21,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:21,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227003564] [2021-04-15 02:32:21,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:21,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:21,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:21,076 INFO L87 Difference]: Start difference. First operand 35052 states and 119458 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) [2021-04-15 02:32:21,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:21,309 INFO L93 Difference]: Finished difference Result 35467 states and 120355 transitions. [2021-04-15 02:32:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:32:21,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:21,371 INFO L225 Difference]: With dead ends: 35467 [2021-04-15 02:32:21,372 INFO L226 Difference]: Without dead ends: 35467 [2021-04-15 02:32:21,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:32:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2021-04-15 02:32:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 35013. [2021-04-15 02:32:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 3.4085742031303554) internal successors, (119341), 35012 states have internal predecessors, (119341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 119341 transitions. [2021-04-15 02:32:22,033 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 119341 transitions. Word has length 22 [2021-04-15 02:32:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:22,033 INFO L480 AbstractCegarLoop]: Abstraction has 35013 states and 119341 transitions. [2021-04-15 02:32:22,033 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) [2021-04-15 02:32:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 119341 transitions. [2021-04-15 02:32:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:22,042 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:22,042 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:22,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24672,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:22,242 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:22,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1376871388, now seen corresponding path program 255 times [2021-04-15 02:32:22,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:22,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863381107] [2021-04-15 02:32:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863381107] [2021-04-15 02:32:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307135163] [2021-04-15 02:32:22,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:22,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:32:22,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:22,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:22,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705972287] [2021-04-15 02:32:22,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:22,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:22,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:22,379 INFO L87 Difference]: Start difference. First operand 35013 states and 119341 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) [2021-04-15 02:32:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:22,697 INFO L93 Difference]: Finished difference Result 35354 states and 119908 transitions. [2021-04-15 02:32:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:22,760 INFO L225 Difference]: With dead ends: 35354 [2021-04-15 02:32:22,760 INFO L226 Difference]: Without dead ends: 35350 [2021-04-15 02:32:22,760 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-04-15 02:32:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34236. [2021-04-15 02:32:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406192493062655) internal successors, (116611), 34235 states have internal predecessors, (116611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116611 transitions. [2021-04-15 02:32:23,452 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116611 transitions. Word has length 22 [2021-04-15 02:32:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:23,452 INFO L480 AbstractCegarLoop]: Abstraction has 34236 states and 116611 transitions. [2021-04-15 02:32:23,452 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) [2021-04-15 02:32:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116611 transitions. [2021-04-15 02:32:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:23,461 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:23,461 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:23,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24673 [2021-04-15 02:32:23,666 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:23,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591385, now seen corresponding path program 256 times [2021-04-15 02:32:23,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:23,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035735254] [2021-04-15 02:32:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:23,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035735254] [2021-04-15 02:32:23,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261168836] [2021-04-15 02:32:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:23,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:23,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:23,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:23,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:32:23,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864223202] [2021-04-15 02:32:23,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:23,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:23,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:23,815 INFO L87 Difference]: Start difference. First operand 34236 states and 116611 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) [2021-04-15 02:32:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:24,101 INFO L93 Difference]: Finished difference Result 34750 states and 117977 transitions. [2021-04-15 02:32:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:24,101 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 22 [2021-04-15 02:32:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:24,161 INFO L225 Difference]: With dead ends: 34750 [2021-04-15 02:32:24,162 INFO L226 Difference]: Without dead ends: 34744 [2021-04-15 02:32:24,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:32:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34744 states. [2021-04-15 02:32:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34744 to 34236. [2021-04-15 02:32:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406134073316781) internal successors, (116609), 34235 states have internal predecessors, (116609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116609 transitions. [2021-04-15 02:32:24,914 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116609 transitions. Word has length 22 [2021-04-15 02:32:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:24,915 INFO L480 AbstractCegarLoop]: Abstraction has 34236 states and 116609 transitions. [2021-04-15 02:32:24,915 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) [2021-04-15 02:32:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116609 transitions. [2021-04-15 02:32:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:24,923 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:24,923 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:25,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24674 [2021-04-15 02:32:25,124 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2119589156, now seen corresponding path program 257 times [2021-04-15 02:32:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166813978] [2021-04-15 02:32:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166813978] [2021-04-15 02:32:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196316258] [2021-04-15 02:32:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:25,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:25,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:25,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:25,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:25,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-04-15 02:32:25,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725992154] [2021-04-15 02:32:25,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:32:25,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:32:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:25,266 INFO L87 Difference]: Start difference. First operand 34236 states and 116609 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) [2021-04-15 02:32:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:25,685 INFO L93 Difference]: Finished difference Result 42443 states and 142235 transitions. [2021-04-15 02:32:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:32:25,685 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 22 [2021-04-15 02:32:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:25,769 INFO L225 Difference]: With dead ends: 42443 [2021-04-15 02:32:25,769 INFO L226 Difference]: Without dead ends: 42443 [2021-04-15 02:32:25,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:32:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42443 states. [2021-04-15 02:32:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42443 to 40328. [2021-04-15 02:32:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386341656954398) internal successors, (136561), 40327 states have internal predecessors, (136561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136561 transitions. [2021-04-15 02:32:26,645 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136561 transitions. Word has length 22 [2021-04-15 02:32:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:26,645 INFO L480 AbstractCegarLoop]: Abstraction has 40328 states and 136561 transitions. [2021-04-15 02:32:26,645 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) [2021-04-15 02:32:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136561 transitions. [2021-04-15 02:32:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:26,654 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:26,654 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:26,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24675 [2021-04-15 02:32:26,855 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1319124531, now seen corresponding path program 258 times [2021-04-15 02:32:26,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:26,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069256694] [2021-04-15 02:32:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:26,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069256694] [2021-04-15 02:32:26,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172038919] [2021-04-15 02:32:26,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:26,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:26,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:26,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:26,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:26,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928329528] [2021-04-15 02:32:26,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:26,997 INFO L87 Difference]: Start difference. First operand 40328 states and 136561 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:27,297 INFO L93 Difference]: Finished difference Result 40963 states and 138166 transitions. [2021-04-15 02:32:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:32:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:27,374 INFO L225 Difference]: With dead ends: 40963 [2021-04-15 02:32:27,374 INFO L226 Difference]: Without dead ends: 40957 [2021-04-15 02:32:27,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:32:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40957 states. [2021-04-15 02:32:28,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40957 to 40328. [2021-04-15 02:32:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386292062389962) internal successors, (136559), 40327 states have internal predecessors, (136559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136559 transitions. [2021-04-15 02:32:28,184 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136559 transitions. Word has length 22 [2021-04-15 02:32:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:28,184 INFO L480 AbstractCegarLoop]: Abstraction has 40328 states and 136559 transitions. [2021-04-15 02:32:28,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136559 transitions. [2021-04-15 02:32:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:28,193 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:28,193 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:28,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24676 [2021-04-15 02:32:28,397 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1483122302, now seen corresponding path program 259 times [2021-04-15 02:32:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:28,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836537002] [2021-04-15 02:32:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836537002] [2021-04-15 02:32:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161395653] [2021-04-15 02:32:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:28,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:28,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:28,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712940066] [2021-04-15 02:32:28,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:28,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:28,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:28,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:28,548 INFO L87 Difference]: Start difference. First operand 40328 states and 136559 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:29,162 INFO L93 Difference]: Finished difference Result 47750 states and 159770 transitions. [2021-04-15 02:32:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:32:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:29,257 INFO L225 Difference]: With dead ends: 47750 [2021-04-15 02:32:29,258 INFO L226 Difference]: Without dead ends: 47750 [2021-04-15 02:32:29,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:32:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47750 states. [2021-04-15 02:32:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47750 to 35545. [2021-04-15 02:32:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35545 states, 35544 states have (on average 3.380429889714157) internal successors, (120154), 35544 states have internal predecessors, (120154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35545 states to 35545 states and 120154 transitions. [2021-04-15 02:32:29,933 INFO L78 Accepts]: Start accepts. Automaton has 35545 states and 120154 transitions. Word has length 22 [2021-04-15 02:32:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:29,933 INFO L480 AbstractCegarLoop]: Abstraction has 35545 states and 120154 transitions. [2021-04-15 02:32:29,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35545 states and 120154 transitions. [2021-04-15 02:32:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:29,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:29,943 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:30,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24677 [2021-04-15 02:32:30,143 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash 474153079, now seen corresponding path program 260 times [2021-04-15 02:32:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:30,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339717511] [2021-04-15 02:32:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339717511] [2021-04-15 02:32:30,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069960577] [2021-04-15 02:32:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:30,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:30,420 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:32:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:30,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:30,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:30,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535356285] [2021-04-15 02:32:30,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:30,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:30,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:30,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:30,433 INFO L87 Difference]: Start difference. First operand 35545 states and 120154 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:30,779 INFO L93 Difference]: Finished difference Result 36460 states and 122661 transitions. [2021-04-15 02:32:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:32:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:30,842 INFO L225 Difference]: With dead ends: 36460 [2021-04-15 02:32:30,842 INFO L226 Difference]: Without dead ends: 36453 [2021-04-15 02:32:30,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:32:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36453 states. [2021-04-15 02:32:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36453 to 35618. [2021-04-15 02:32:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35618 states, 35617 states have (on average 3.3797624729763878) internal successors, (120377), 35617 states have internal predecessors, (120377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35618 states to 35618 states and 120377 transitions. [2021-04-15 02:32:31,429 INFO L78 Accepts]: Start accepts. Automaton has 35618 states and 120377 transitions. Word has length 22 [2021-04-15 02:32:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 35618 states and 120377 transitions. [2021-04-15 02:32:31,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 35618 states and 120377 transitions. [2021-04-15 02:32:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:31,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:31,439 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:31,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24678,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:31,639 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:31,639 INFO L82 PathProgramCache]: Analyzing trace with hash 215665124, now seen corresponding path program 261 times [2021-04-15 02:32:31,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:31,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958528104] [2021-04-15 02:32:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:31,805 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-04-15 02:32:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958528104] [2021-04-15 02:32:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411453782] [2021-04-15 02:32:31,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:31,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:31,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:31,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:31,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344250164] [2021-04-15 02:32:31,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:31,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:31,931 INFO L87 Difference]: Start difference. First operand 35618 states and 120377 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:32,408 INFO L93 Difference]: Finished difference Result 40432 states and 135039 transitions. [2021-04-15 02:32:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:32:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:32,481 INFO L225 Difference]: With dead ends: 40432 [2021-04-15 02:32:32,481 INFO L226 Difference]: Without dead ends: 40432 [2021-04-15 02:32:32,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:32:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40432 states. [2021-04-15 02:32:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40432 to 35682. [2021-04-15 02:32:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35682 states, 35681 states have (on average 3.3822202292536643) internal successors, (120681), 35681 states have internal predecessors, (120681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35682 states to 35682 states and 120681 transitions. [2021-04-15 02:32:33,264 INFO L78 Accepts]: Start accepts. Automaton has 35682 states and 120681 transitions. Word has length 22 [2021-04-15 02:32:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:33,264 INFO L480 AbstractCegarLoop]: Abstraction has 35682 states and 120681 transitions. [2021-04-15 02:32:33,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 35682 states and 120681 transitions. [2021-04-15 02:32:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:33,273 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:33,273 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:33,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24679 [2021-04-15 02:32:33,481 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1231478759, now seen corresponding path program 262 times [2021-04-15 02:32:33,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:33,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880061719] [2021-04-15 02:32:33,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880061719] [2021-04-15 02:32:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442450335] [2021-04-15 02:32:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:33,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:33,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:33,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:33,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:33,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:33,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:33,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243857731] [2021-04-15 02:32:33,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:33,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:33,625 INFO L87 Difference]: Start difference. First operand 35682 states and 120681 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:33,934 INFO L93 Difference]: Finished difference Result 36907 states and 124167 transitions. [2021-04-15 02:32:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:33,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:34,001 INFO L225 Difference]: With dead ends: 36907 [2021-04-15 02:32:34,002 INFO L226 Difference]: Without dead ends: 36901 [2021-04-15 02:32:34,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36901 states. [2021-04-15 02:32:34,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36901 to 35689. [2021-04-15 02:32:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 35688 states have (on average 3.3821452589105583) internal successors, (120702), 35688 states have internal predecessors, (120702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 120702 transitions. [2021-04-15 02:32:34,813 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 120702 transitions. Word has length 22 [2021-04-15 02:32:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:34,813 INFO L480 AbstractCegarLoop]: Abstraction has 35689 states and 120702 transitions. [2021-04-15 02:32:34,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 120702 transitions. [2021-04-15 02:32:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:34,823 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:34,823 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:35,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24680 [2021-04-15 02:32:35,023 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1067480988, now seen corresponding path program 263 times [2021-04-15 02:32:35,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:35,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704208090] [2021-04-15 02:32:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704208090] [2021-04-15 02:32:35,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925852989] [2021-04-15 02:32:35,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:35,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:35,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:35,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:35,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:35,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:35,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374879379] [2021-04-15 02:32:35,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:35,188 INFO L87 Difference]: Start difference. First operand 35689 states and 120702 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:35,554 INFO L93 Difference]: Finished difference Result 37769 states and 126742 transitions. [2021-04-15 02:32:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:35,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:35,621 INFO L225 Difference]: With dead ends: 37769 [2021-04-15 02:32:35,621 INFO L226 Difference]: Without dead ends: 37769 [2021-04-15 02:32:35,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:32:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37769 states. [2021-04-15 02:32:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37769 to 35344. [2021-04-15 02:32:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387177093059446) internal successors, (119713), 35343 states have internal predecessors, (119713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119713 transitions. [2021-04-15 02:32:36,450 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119713 transitions. Word has length 22 [2021-04-15 02:32:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:36,450 INFO L480 AbstractCegarLoop]: Abstraction has 35344 states and 119713 transitions. [2021-04-15 02:32:36,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119713 transitions. [2021-04-15 02:32:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:36,460 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:36,460 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:36,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24681,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:36,674 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:36,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2076450211, now seen corresponding path program 264 times [2021-04-15 02:32:36,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:36,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677935334] [2021-04-15 02:32:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:36,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677935334] [2021-04-15 02:32:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513054755] [2021-04-15 02:32:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:36,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:36,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:36,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:36,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:36,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:36,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244650262] [2021-04-15 02:32:36,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:36,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:36,835 INFO L87 Difference]: Start difference. First operand 35344 states and 119713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:37,102 INFO L93 Difference]: Finished difference Result 35796 states and 120895 transitions. [2021-04-15 02:32:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:37,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:37,165 INFO L225 Difference]: With dead ends: 35796 [2021-04-15 02:32:37,166 INFO L226 Difference]: Without dead ends: 35789 [2021-04-15 02:32:37,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35789 states. [2021-04-15 02:32:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35789 to 35344. [2021-04-15 02:32:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387148798913505) internal successors, (119712), 35343 states have internal predecessors, (119712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119712 transitions. [2021-04-15 02:32:37,956 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119712 transitions. Word has length 22 [2021-04-15 02:32:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:37,957 INFO L480 AbstractCegarLoop]: Abstraction has 35344 states and 119712 transitions. [2021-04-15 02:32:37,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:37,957 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119712 transitions. [2021-04-15 02:32:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:37,966 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:37,966 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:38,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24682,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:38,173 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1960029130, now seen corresponding path program 265 times [2021-04-15 02:32:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:38,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690730068] [2021-04-15 02:32:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:38,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690730068] [2021-04-15 02:32:38,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094592790] [2021-04-15 02:32:38,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:38,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:38,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:38,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:38,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:38,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834557698] [2021-04-15 02:32:38,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:38,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:38,318 INFO L87 Difference]: Start difference. First operand 35344 states and 119712 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:38,733 INFO L93 Difference]: Finished difference Result 36722 states and 123439 transitions. [2021-04-15 02:32:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:32:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:38,797 INFO L225 Difference]: With dead ends: 36722 [2021-04-15 02:32:38,797 INFO L226 Difference]: Without dead ends: 36722 [2021-04-15 02:32:38,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 02:32:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2021-04-15 02:32:39,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 35442. [2021-04-15 02:32:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.387799441325019) internal successors, (120067), 35441 states have internal predecessors, (120067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120067 transitions. [2021-04-15 02:32:39,541 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120067 transitions. Word has length 22 [2021-04-15 02:32:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:39,541 INFO L480 AbstractCegarLoop]: Abstraction has 35442 states and 120067 transitions. [2021-04-15 02:32:39,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120067 transitions. [2021-04-15 02:32:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:39,550 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:39,550 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:39,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24683,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:39,751 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1794205849, now seen corresponding path program 266 times [2021-04-15 02:32:39,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:39,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388468637] [2021-04-15 02:32:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388468637] [2021-04-15 02:32:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536583763] [2021-04-15 02:32:39,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:39,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:39,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913193136] [2021-04-15 02:32:39,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:39,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:39,902 INFO L87 Difference]: Start difference. First operand 35442 states and 120067 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:40,162 INFO L93 Difference]: Finished difference Result 35860 states and 121183 transitions. [2021-04-15 02:32:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:40,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:40,226 INFO L225 Difference]: With dead ends: 35860 [2021-04-15 02:32:40,226 INFO L226 Difference]: Without dead ends: 35852 [2021-04-15 02:32:40,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2021-04-15 02:32:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 35442. [2021-04-15 02:32:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.38777122541689) internal successors, (120066), 35441 states have internal predecessors, (120066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120066 transitions. [2021-04-15 02:32:41,027 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120066 transitions. Word has length 22 [2021-04-15 02:32:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:41,027 INFO L480 AbstractCegarLoop]: Abstraction has 35442 states and 120066 transitions. [2021-04-15 02:32:41,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120066 transitions. [2021-04-15 02:32:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:41,037 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:41,037 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:41,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24684,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:41,237 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1323562276, now seen corresponding path program 267 times [2021-04-15 02:32:41,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:41,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469608332] [2021-04-15 02:32:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469608332] [2021-04-15 02:32:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883040825] [2021-04-15 02:32:41,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:41,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:41,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:41,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:41,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390271119] [2021-04-15 02:32:41,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:41,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:41,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:41,401 INFO L87 Difference]: Start difference. First operand 35442 states and 120066 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:41,917 INFO L93 Difference]: Finished difference Result 36817 states and 123640 transitions. [2021-04-15 02:32:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 02:32:41,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:41,981 INFO L225 Difference]: With dead ends: 36817 [2021-04-15 02:32:41,981 INFO L226 Difference]: Without dead ends: 36817 [2021-04-15 02:32:41,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:32:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-04-15 02:32:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 35424. [2021-04-15 02:32:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35424 states, 35423 states have (on average 3.3881376506789374) internal successors, (120018), 35423 states have internal predecessors, (120018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35424 states to 35424 states and 120018 transitions. [2021-04-15 02:32:42,748 INFO L78 Accepts]: Start accepts. Automaton has 35424 states and 120018 transitions. Word has length 22 [2021-04-15 02:32:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:42,748 INFO L480 AbstractCegarLoop]: Abstraction has 35424 states and 120018 transitions. [2021-04-15 02:32:42,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 35424 states and 120018 transitions. [2021-04-15 02:32:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:42,757 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:42,757 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:42,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24685 [2021-04-15 02:32:42,957 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1304197875, now seen corresponding path program 268 times [2021-04-15 02:32:42,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:42,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534530816] [2021-04-15 02:32:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:43,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534530816] [2021-04-15 02:32:43,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838399661] [2021-04-15 02:32:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:43,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:43,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:43,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:43,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:43,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334753456] [2021-04-15 02:32:43,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:43,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:43,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:43,104 INFO L87 Difference]: Start difference. First operand 35424 states and 120018 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:43,397 INFO L93 Difference]: Finished difference Result 37279 states and 125493 transitions. [2021-04-15 02:32:43,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:32:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:43,469 INFO L225 Difference]: With dead ends: 37279 [2021-04-15 02:32:43,469 INFO L226 Difference]: Without dead ends: 37273 [2021-04-15 02:32:43,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37273 states. [2021-04-15 02:32:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37273 to 35486. [2021-04-15 02:32:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35486 states, 35485 states have (on average 3.3883049175708044) internal successors, (120234), 35485 states have internal predecessors, (120234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 120234 transitions. [2021-04-15 02:32:44,286 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 120234 transitions. Word has length 22 [2021-04-15 02:32:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:44,287 INFO L480 AbstractCegarLoop]: Abstraction has 35486 states and 120234 transitions. [2021-04-15 02:32:44,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 120234 transitions. [2021-04-15 02:32:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:44,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:44,296 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:44,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24686,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:44,496 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1468195646, now seen corresponding path program 269 times [2021-04-15 02:32:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:44,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989437027] [2021-04-15 02:32:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989437027] [2021-04-15 02:32:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044488635] [2021-04-15 02:32:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:44,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:32:44,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:44,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:44,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:44,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:44,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657885004] [2021-04-15 02:32:44,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:44,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:44,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:44,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:44,645 INFO L87 Difference]: Start difference. First operand 35486 states and 120234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:44,941 INFO L93 Difference]: Finished difference Result 36239 states and 122100 transitions. [2021-04-15 02:32:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:44,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:45,005 INFO L225 Difference]: With dead ends: 36239 [2021-04-15 02:32:45,006 INFO L226 Difference]: Without dead ends: 36239 [2021-04-15 02:32:45,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:32:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2021-04-15 02:32:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 35451. [2021-04-15 02:32:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.389026798307475) internal successors, (120141), 35450 states have internal predecessors, (120141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120141 transitions. [2021-04-15 02:32:45,789 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120141 transitions. Word has length 22 [2021-04-15 02:32:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:45,789 INFO L480 AbstractCegarLoop]: Abstraction has 35451 states and 120141 transitions. [2021-04-15 02:32:45,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120141 transitions. [2021-04-15 02:32:45,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:45,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:45,798 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:46,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24687 [2021-04-15 02:32:46,005 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash 459226423, now seen corresponding path program 270 times [2021-04-15 02:32:46,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:46,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747015453] [2021-04-15 02:32:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747015453] [2021-04-15 02:32:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492413141] [2021-04-15 02:32:46,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:46,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:32:46,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:46,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:46,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762051192] [2021-04-15 02:32:46,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:46,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:46,151 INFO L87 Difference]: Start difference. First operand 35451 states and 120141 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:46,415 INFO L93 Difference]: Finished difference Result 35974 states and 121515 transitions. [2021-04-15 02:32:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:32:46,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:46,477 INFO L225 Difference]: With dead ends: 35974 [2021-04-15 02:32:46,478 INFO L226 Difference]: Without dead ends: 35967 [2021-04-15 02:32:46,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35967 states. [2021-04-15 02:32:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35967 to 35451. [2021-04-15 02:32:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.3889985895627643) internal successors, (120140), 35450 states have internal predecessors, (120140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120140 transitions. [2021-04-15 02:32:47,261 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120140 transitions. Word has length 22 [2021-04-15 02:32:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:47,262 INFO L480 AbstractCegarLoop]: Abstraction has 35451 states and 120140 transitions. [2021-04-15 02:32:47,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120140 transitions. [2021-04-15 02:32:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:47,270 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:47,270 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:47,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24688,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,471 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 200738468, now seen corresponding path program 271 times [2021-04-15 02:32:47,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:47,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674233392] [2021-04-15 02:32:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:47,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674233392] [2021-04-15 02:32:47,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120677550] [2021-04-15 02:32:47,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:47,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:47,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:47,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:47,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42326920] [2021-04-15 02:32:47,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:47,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:47,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:47,627 INFO L87 Difference]: Start difference. First operand 35451 states and 120140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:47,977 INFO L93 Difference]: Finished difference Result 35935 states and 121243 transitions. [2021-04-15 02:32:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:32:47,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:47,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:48,040 INFO L225 Difference]: With dead ends: 35935 [2021-04-15 02:32:48,040 INFO L226 Difference]: Without dead ends: 35935 [2021-04-15 02:32:48,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:32:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35935 states. [2021-04-15 02:32:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35935 to 35458. [2021-04-15 02:32:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389062808472234) internal successors, (120166), 35457 states have internal predecessors, (120166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120166 transitions. [2021-04-15 02:32:48,829 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120166 transitions. Word has length 22 [2021-04-15 02:32:48,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:48,829 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120166 transitions. [2021-04-15 02:32:48,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120166 transitions. [2021-04-15 02:32:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:48,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:48,839 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:49,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24689 [2021-04-15 02:32:49,053 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash 34915187, now seen corresponding path program 272 times [2021-04-15 02:32:49,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:49,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425425864] [2021-04-15 02:32:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425425864] [2021-04-15 02:32:49,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978984889] [2021-04-15 02:32:49,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:49,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:49,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945215748] [2021-04-15 02:32:49,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:49,204 INFO L87 Difference]: Start difference. First operand 35458 states and 120166 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:49,464 INFO L93 Difference]: Finished difference Result 35954 states and 121474 transitions. [2021-04-15 02:32:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:32:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:49,528 INFO L225 Difference]: With dead ends: 35954 [2021-04-15 02:32:49,528 INFO L226 Difference]: Without dead ends: 35946 [2021-04-15 02:32:49,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35946 states. [2021-04-15 02:32:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35946 to 35458. [2021-04-15 02:32:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-04-15 02:32:50,064 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-04-15 02:32:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:50,064 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-04-15 02:32:50,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-04-15 02:32:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:50,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:50,074 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:50,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24690,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:50,289 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash -435728386, now seen corresponding path program 273 times [2021-04-15 02:32:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:50,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637043881] [2021-04-15 02:32:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637043881] [2021-04-15 02:32:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449017593] [2021-04-15 02:32:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:32:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:50,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:50,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:50,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076066419] [2021-04-15 02:32:50,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:50,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:50,632 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:51,087 INFO L93 Difference]: Finished difference Result 35839 states and 120966 transitions. [2021-04-15 02:32:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:32:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:51,157 INFO L225 Difference]: With dead ends: 35839 [2021-04-15 02:32:51,158 INFO L226 Difference]: Without dead ends: 35839 [2021-04-15 02:32:51,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 508.6ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:32:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35839 states. [2021-04-15 02:32:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35839 to 35458. [2021-04-15 02:32:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-04-15 02:32:51,744 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-04-15 02:32:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:51,744 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-04-15 02:32:51,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:51,744 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-04-15 02:32:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:51,754 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:51,754 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:51,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24691,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:51,954 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:51,954 INFO L82 PathProgramCache]: Analyzing trace with hash -233831241, now seen corresponding path program 274 times [2021-04-15 02:32:51,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:51,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192422337] [2021-04-15 02:32:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:52,205 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:52,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192422337] [2021-04-15 02:32:52,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753587129] [2021-04-15 02:32:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:52,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:32:52,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:52,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:52,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178047042] [2021-04-15 02:32:52,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:52,273 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:52,556 INFO L93 Difference]: Finished difference Result 35916 states and 121397 transitions. [2021-04-15 02:32:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:32:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:52,627 INFO L225 Difference]: With dead ends: 35916 [2021-04-15 02:32:52,627 INFO L226 Difference]: Without dead ends: 35907 [2021-04-15 02:32:52,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 343.7ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:32:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-04-15 02:32:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 35458. [2021-04-15 02:32:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389006402120879) internal successors, (120164), 35457 states have internal predecessors, (120164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120164 transitions. [2021-04-15 02:32:53,200 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120164 transitions. Word has length 22 [2021-04-15 02:32:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:53,200 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120164 transitions. [2021-04-15 02:32:53,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120164 transitions. [2021-04-15 02:32:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:53,210 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:53,210 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:53,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24692,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:53,410 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1308635620, now seen corresponding path program 275 times [2021-04-15 02:32:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:53,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449690986] [2021-04-15 02:32:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449690986] [2021-04-15 02:32:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082236310] [2021-04-15 02:32:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:53,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:32:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:53,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:53,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:32:53,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689715109] [2021-04-15 02:32:53,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:32:53,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:32:53,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:32:53,567 INFO L87 Difference]: Start difference. First operand 35458 states and 120164 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:54,206 INFO L93 Difference]: Finished difference Result 35992 states and 121396 transitions. [2021-04-15 02:32:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:32:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:32:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:54,272 INFO L225 Difference]: With dead ends: 35992 [2021-04-15 02:32:54,272 INFO L226 Difference]: Without dead ends: 35992 [2021-04-15 02:32:54,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 02:32:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35992 states. [2021-04-15 02:32:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35992 to 35459. [2021-04-15 02:32:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 3.3889954312143944) internal successors, (120167), 35458 states have internal predecessors, (120167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 120167 transitions. [2021-04-15 02:32:54,822 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 120167 transitions. Word has length 22 [2021-04-15 02:32:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:54,822 INFO L480 AbstractCegarLoop]: Abstraction has 35459 states and 120167 transitions. [2021-04-15 02:32:54,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 120167 transitions. [2021-04-15 02:32:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:54,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:54,831 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:55,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24693,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:55,032 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:55,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1917455481, now seen corresponding path program 276 times [2021-04-15 02:32:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:55,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671041142] [2021-04-15 02:32:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:55,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671041142] [2021-04-15 02:32:55,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730242739] [2021-04-15 02:32:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:55,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:32:55,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:55,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:55,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819059027] [2021-04-15 02:32:55,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:55,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:55,328 INFO L87 Difference]: Start difference. First operand 35459 states and 120167 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) [2021-04-15 02:32:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:55,520 INFO L93 Difference]: Finished difference Result 35845 states and 120782 transitions. [2021-04-15 02:32:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:32:55,521 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 22 [2021-04-15 02:32:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:55,584 INFO L225 Difference]: With dead ends: 35845 [2021-04-15 02:32:55,584 INFO L226 Difference]: Without dead ends: 35845 [2021-04-15 02:32:55,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:32:55,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35845 states. [2021-04-15 02:32:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35845 to 35470. [2021-04-15 02:32:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35470 states, 35469 states have (on average 3.389128534776847) internal successors, (120209), 35469 states have internal predecessors, (120209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35470 states to 35470 states and 120209 transitions. [2021-04-15 02:32:56,160 INFO L78 Accepts]: Start accepts. Automaton has 35470 states and 120209 transitions. Word has length 22 [2021-04-15 02:32:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:56,160 INFO L480 AbstractCegarLoop]: Abstraction has 35470 states and 120209 transitions. [2021-04-15 02:32:56,160 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) [2021-04-15 02:32:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35470 states and 120209 transitions. [2021-04-15 02:32:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:56,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:56,169 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:56,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24694 [2021-04-15 02:32:56,369 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -834165348, now seen corresponding path program 277 times [2021-04-15 02:32:56,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:56,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50511293] [2021-04-15 02:32:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50511293] [2021-04-15 02:32:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583481180] [2021-04-15 02:32:56,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:56,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:32:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:56,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838507720] [2021-04-15 02:32:56,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:56,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:56,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:56,494 INFO L87 Difference]: Start difference. First operand 35470 states and 120209 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) [2021-04-15 02:32:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:56,875 INFO L93 Difference]: Finished difference Result 36773 states and 124101 transitions. [2021-04-15 02:32:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:56,876 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 22 [2021-04-15 02:32:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:56,939 INFO L225 Difference]: With dead ends: 36773 [2021-04-15 02:32:56,939 INFO L226 Difference]: Without dead ends: 36769 [2021-04-15 02:32:56,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2021-04-15 02:32:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 36539. [2021-04-15 02:32:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.388362800372215) internal successors, (123804), 36538 states have internal predecessors, (123804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123804 transitions. [2021-04-15 02:32:57,507 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123804 transitions. Word has length 22 [2021-04-15 02:32:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:57,508 INFO L480 AbstractCegarLoop]: Abstraction has 36539 states and 123804 transitions. [2021-04-15 02:32:57,508 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) [2021-04-15 02:32:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123804 transitions. [2021-04-15 02:32:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:57,516 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:57,516 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:57,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24695,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,717 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash -177363171, now seen corresponding path program 278 times [2021-04-15 02:32:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:57,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469343951] [2021-04-15 02:32:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469343951] [2021-04-15 02:32:57,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736032099] [2021-04-15 02:32:57,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:57,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:32:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:57,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:57,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:57,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400875607] [2021-04-15 02:32:57,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:57,843 INFO L87 Difference]: Start difference. First operand 36539 states and 123804 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) [2021-04-15 02:32:58,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:58,215 INFO L93 Difference]: Finished difference Result 36910 states and 124367 transitions. [2021-04-15 02:32:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:32:58,216 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 22 [2021-04-15 02:32:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:58,278 INFO L225 Difference]: With dead ends: 36910 [2021-04-15 02:32:58,278 INFO L226 Difference]: Without dead ends: 36909 [2021-04-15 02:32:58,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:32:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-04-15 02:32:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 36539. [2021-04-15 02:32:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.3881164814713447) internal successors, (123795), 36538 states have internal predecessors, (123795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:32:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123795 transitions. [2021-04-15 02:32:58,860 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123795 transitions. Word has length 22 [2021-04-15 02:32:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:32:58,860 INFO L480 AbstractCegarLoop]: Abstraction has 36539 states and 123795 transitions. [2021-04-15 02:32:58,861 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) [2021-04-15 02:32:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123795 transitions. [2021-04-15 02:32:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:32:58,869 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:32:58,869 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:32:59,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24696 [2021-04-15 02:32:59,070 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:32:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:32:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash 745055562, now seen corresponding path program 279 times [2021-04-15 02:32:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:32:59,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232685771] [2021-04-15 02:32:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:32:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:32:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232685771] [2021-04-15 02:32:59,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990349445] [2021-04-15 02:32:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:32:59,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:32:59,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:32:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:32:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:32:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:32:59,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:32:59,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:32:59,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45406844] [2021-04-15 02:32:59,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:32:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:32:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:32:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:32:59,206 INFO L87 Difference]: Start difference. First operand 36539 states and 123795 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) [2021-04-15 02:32:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:32:59,519 INFO L93 Difference]: Finished difference Result 37170 states and 125257 transitions. [2021-04-15 02:32:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:32:59,520 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 22 [2021-04-15 02:32:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:32:59,579 INFO L225 Difference]: With dead ends: 37170 [2021-04-15 02:32:59,579 INFO L226 Difference]: Without dead ends: 37170 [2021-04-15 02:32:59,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:32:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2021-04-15 02:33:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 36554. [2021-04-15 02:33:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.3879024977430032) internal successors, (123838), 36553 states have internal predecessors, (123838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123838 transitions. [2021-04-15 02:33:00,127 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123838 transitions. Word has length 22 [2021-04-15 02:33:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:00,127 INFO L480 AbstractCegarLoop]: Abstraction has 36554 states and 123838 transitions. [2021-04-15 02:33:00,127 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) [2021-04-15 02:33:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123838 transitions. [2021-04-15 02:33:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:00,136 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:00,136 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:00,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24697 [2021-04-15 02:33:00,337 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1533250137, now seen corresponding path program 280 times [2021-04-15 02:33:00,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:00,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326160070] [2021-04-15 02:33:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326160070] [2021-04-15 02:33:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449543592] [2021-04-15 02:33:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:00,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:00,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:00,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:00,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:00,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251121494] [2021-04-15 02:33:00,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:00,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:00,470 INFO L87 Difference]: Start difference. First operand 36554 states and 123838 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) [2021-04-15 02:33:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:00,899 INFO L93 Difference]: Finished difference Result 36930 states and 124408 transitions. [2021-04-15 02:33:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:33:00,900 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 22 [2021-04-15 02:33:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:00,955 INFO L225 Difference]: With dead ends: 36930 [2021-04-15 02:33:00,955 INFO L226 Difference]: Without dead ends: 36928 [2021-04-15 02:33:00,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36928 states. [2021-04-15 02:33:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36928 to 36554. [2021-04-15 02:33:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.387847782671737) internal successors, (123836), 36553 states have internal predecessors, (123836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:01,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123836 transitions. [2021-04-15 02:33:01,492 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123836 transitions. Word has length 22 [2021-04-15 02:33:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:01,492 INFO L480 AbstractCegarLoop]: Abstraction has 36554 states and 123836 transitions. [2021-04-15 02:33:01,492 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) [2021-04-15 02:33:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123836 transitions. [2021-04-15 02:33:01,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:01,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:01,501 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:01,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24698 [2021-04-15 02:33:01,701 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:01,702 INFO L82 PathProgramCache]: Analyzing trace with hash -983991772, now seen corresponding path program 281 times [2021-04-15 02:33:01,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:01,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292119803] [2021-04-15 02:33:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292119803] [2021-04-15 02:33:01,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87571294] [2021-04-15 02:33:01,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:01,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:33:01,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:01,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:01,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:01,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:01,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501582155] [2021-04-15 02:33:01,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:01,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:01,835 INFO L87 Difference]: Start difference. First operand 36554 states and 123836 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) [2021-04-15 02:33:02,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:02,072 INFO L93 Difference]: Finished difference Result 37526 states and 126283 transitions. [2021-04-15 02:33:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:02,073 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 22 [2021-04-15 02:33:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:02,140 INFO L225 Difference]: With dead ends: 37526 [2021-04-15 02:33:02,140 INFO L226 Difference]: Without dead ends: 37526 [2021-04-15 02:33:02,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:02,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37526 states. [2021-04-15 02:33:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37526 to 36659. [2021-04-15 02:33:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36659 states, 36658 states have (on average 3.386627748376889) internal successors, (124147), 36658 states have internal predecessors, (124147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36659 states to 36659 states and 124147 transitions. [2021-04-15 02:33:02,798 INFO L78 Accepts]: Start accepts. Automaton has 36659 states and 124147 transitions. Word has length 22 [2021-04-15 02:33:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:02,798 INFO L480 AbstractCegarLoop]: Abstraction has 36659 states and 124147 transitions. [2021-04-15 02:33:02,798 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) [2021-04-15 02:33:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 36659 states and 124147 transitions. [2021-04-15 02:33:02,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:02,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:02,808 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:03,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24699 [2021-04-15 02:33:03,008 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1272312163, now seen corresponding path program 282 times [2021-04-15 02:33:03,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:03,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842619295] [2021-04-15 02:33:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842619295] [2021-04-15 02:33:03,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16342211] [2021-04-15 02:33:03,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:03,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:03,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:03,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455743089] [2021-04-15 02:33:03,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:03,152 INFO L87 Difference]: Start difference. First operand 36659 states and 124147 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) [2021-04-15 02:33:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:03,475 INFO L93 Difference]: Finished difference Result 44560 states and 150459 transitions. [2021-04-15 02:33:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:03,477 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 22 [2021-04-15 02:33:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:03,737 INFO L225 Difference]: With dead ends: 44560 [2021-04-15 02:33:03,737 INFO L226 Difference]: Without dead ends: 44557 [2021-04-15 02:33:03,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44557 states. [2021-04-15 02:33:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44557 to 37399. [2021-04-15 02:33:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37399 states, 37398 states have (on average 3.3886571474410396) internal successors, (126729), 37398 states have internal predecessors, (126729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37399 states to 37399 states and 126729 transitions. [2021-04-15 02:33:04,318 INFO L78 Accepts]: Start accepts. Automaton has 37399 states and 126729 transitions. Word has length 22 [2021-04-15 02:33:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:04,319 INFO L480 AbstractCegarLoop]: Abstraction has 37399 states and 126729 transitions. [2021-04-15 02:33:04,319 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) [2021-04-15 02:33:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 37399 states and 126729 transitions. [2021-04-15 02:33:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:04,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:04,328 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:04,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24700,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:04,528 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1250115722, now seen corresponding path program 283 times [2021-04-15 02:33:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:04,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442488408] [2021-04-15 02:33:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442488408] [2021-04-15 02:33:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479995879] [2021-04-15 02:33:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:04,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:04,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898682167] [2021-04-15 02:33:04,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:04,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:04,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:04,665 INFO L87 Difference]: Start difference. First operand 37399 states and 126729 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) [2021-04-15 02:33:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:05,114 INFO L93 Difference]: Finished difference Result 46106 states and 155238 transitions. [2021-04-15 02:33:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:05,115 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 22 [2021-04-15 02:33:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:05,197 INFO L225 Difference]: With dead ends: 46106 [2021-04-15 02:33:05,197 INFO L226 Difference]: Without dead ends: 46106 [2021-04-15 02:33:05,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:33:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46106 states. [2021-04-15 02:33:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46106 to 41545. [2021-04-15 02:33:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41545 states, 41544 states have (on average 3.3881667629501253) internal successors, (140758), 41544 states have internal predecessors, (140758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41545 states to 41545 states and 140758 transitions. [2021-04-15 02:33:05,872 INFO L78 Accepts]: Start accepts. Automaton has 41545 states and 140758 transitions. Word has length 22 [2021-04-15 02:33:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:05,872 INFO L480 AbstractCegarLoop]: Abstraction has 41545 states and 140758 transitions. [2021-04-15 02:33:05,872 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) [2021-04-15 02:33:05,872 INFO L276 IsEmpty]: Start isEmpty. Operand 41545 states and 140758 transitions. [2021-04-15 02:33:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:05,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:05,881 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:06,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24701 [2021-04-15 02:33:06,081 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:06,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1949569753, now seen corresponding path program 284 times [2021-04-15 02:33:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:06,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848612590] [2021-04-15 02:33:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848612590] [2021-04-15 02:33:06,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54716803] [2021-04-15 02:33:06,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:06,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:06,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:06,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:06,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233481459] [2021-04-15 02:33:06,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:06,225 INFO L87 Difference]: Start difference. First operand 41545 states and 140758 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) [2021-04-15 02:33:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:06,648 INFO L93 Difference]: Finished difference Result 46718 states and 157685 transitions. [2021-04-15 02:33:06,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:06,649 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 22 [2021-04-15 02:33:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:06,735 INFO L225 Difference]: With dead ends: 46718 [2021-04-15 02:33:06,735 INFO L226 Difference]: Without dead ends: 46714 [2021-04-15 02:33:06,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46714 states. [2021-04-15 02:33:07,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46714 to 41727. [2021-04-15 02:33:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41727 states, 41726 states have (on average 3.388486794804199) internal successors, (141388), 41726 states have internal predecessors, (141388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41727 states to 41727 states and 141388 transitions. [2021-04-15 02:33:07,666 INFO L78 Accepts]: Start accepts. Automaton has 41727 states and 141388 transitions. Word has length 22 [2021-04-15 02:33:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:07,666 INFO L480 AbstractCegarLoop]: Abstraction has 41727 states and 141388 transitions. [2021-04-15 02:33:07,666 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) [2021-04-15 02:33:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 41727 states and 141388 transitions. [2021-04-15 02:33:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:07,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:07,674 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:07,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24702 [2021-04-15 02:33:07,875 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1787971300, now seen corresponding path program 285 times [2021-04-15 02:33:07,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:07,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114072563] [2021-04-15 02:33:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114072563] [2021-04-15 02:33:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815994476] [2021-04-15 02:33:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:07,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:33:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:08,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:08,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864264664] [2021-04-15 02:33:08,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:08,014 INFO L87 Difference]: Start difference. First operand 41727 states and 141388 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) [2021-04-15 02:33:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:08,266 INFO L93 Difference]: Finished difference Result 45021 states and 151377 transitions. [2021-04-15 02:33:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:33:08,266 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 22 [2021-04-15 02:33:08,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:08,345 INFO L225 Difference]: With dead ends: 45021 [2021-04-15 02:33:08,346 INFO L226 Difference]: Without dead ends: 45021 [2021-04-15 02:33:08,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45021 states. [2021-04-15 02:33:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45021 to 44522. [2021-04-15 02:33:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.3770580175647447) internal successors, (150350), 44521 states have internal predecessors, (150350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 150350 transitions. [2021-04-15 02:33:09,246 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 150350 transitions. Word has length 22 [2021-04-15 02:33:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:09,246 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 150350 transitions. [2021-04-15 02:33:09,246 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) [2021-04-15 02:33:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 150350 transitions. [2021-04-15 02:33:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:09,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:09,255 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:09,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24703,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:09,455 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:09,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305955, now seen corresponding path program 286 times [2021-04-15 02:33:09,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:09,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198655043] [2021-04-15 02:33:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:09,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198655043] [2021-04-15 02:33:09,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874865720] [2021-04-15 02:33:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:09,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:09,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:09,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:09,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:09,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879775786] [2021-04-15 02:33:09,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:09,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:09,592 INFO L87 Difference]: Start difference. First operand 44522 states and 150350 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) [2021-04-15 02:33:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:09,896 INFO L93 Difference]: Finished difference Result 47600 states and 159895 transitions. [2021-04-15 02:33:09,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:09,896 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 22 [2021-04-15 02:33:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:09,981 INFO L225 Difference]: With dead ends: 47600 [2021-04-15 02:33:09,981 INFO L226 Difference]: Without dead ends: 47595 [2021-04-15 02:33:09,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:33:10,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47595 states. [2021-04-15 02:33:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47595 to 44534. [2021-04-15 02:33:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44534 states, 44533 states have (on average 3.377001324860216) internal successors, (150388), 44533 states have internal predecessors, (150388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44534 states to 44534 states and 150388 transitions. [2021-04-15 02:33:10,933 INFO L78 Accepts]: Start accepts. Automaton has 44534 states and 150388 transitions. Word has length 22 [2021-04-15 02:33:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:10,933 INFO L480 AbstractCegarLoop]: Abstraction has 44534 states and 150388 transitions. [2021-04-15 02:33:10,933 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) [2021-04-15 02:33:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 44534 states and 150388 transitions. [2021-04-15 02:33:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:10,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:10,942 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:11,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24704,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,143 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1281625034, now seen corresponding path program 287 times [2021-04-15 02:33:11,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:11,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424760599] [2021-04-15 02:33:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:11,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424760599] [2021-04-15 02:33:11,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158883444] [2021-04-15 02:33:11,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:11,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:11,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:11,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:11,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:33:11,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372107685] [2021-04-15 02:33:11,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:33:11,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:11,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:33:11,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:33:11,281 INFO L87 Difference]: Start difference. First operand 44534 states and 150388 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) [2021-04-15 02:33:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:11,500 INFO L93 Difference]: Finished difference Result 45136 states and 151973 transitions. [2021-04-15 02:33:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:33:11,500 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 22 [2021-04-15 02:33:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:11,583 INFO L225 Difference]: With dead ends: 45136 [2021-04-15 02:33:11,583 INFO L226 Difference]: Without dead ends: 45136 [2021-04-15 02:33:11,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:33:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45136 states. [2021-04-15 02:33:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45136 to 44984. [2021-04-15 02:33:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44984 states, 44983 states have (on average 3.373518884912078) internal successors, (151751), 44983 states have internal predecessors, (151751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44984 states to 44984 states and 151751 transitions. [2021-04-15 02:33:12,502 INFO L78 Accepts]: Start accepts. Automaton has 44984 states and 151751 transitions. Word has length 22 [2021-04-15 02:33:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:12,502 INFO L480 AbstractCegarLoop]: Abstraction has 44984 states and 151751 transitions. [2021-04-15 02:33:12,502 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) [2021-04-15 02:33:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 44984 states and 151751 transitions. [2021-04-15 02:33:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:12,512 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:12,512 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:12,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24705,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:12,712 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1694205095, now seen corresponding path program 288 times [2021-04-15 02:33:12,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:12,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24623375] [2021-04-15 02:33:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24623375] [2021-04-15 02:33:12,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512266390] [2021-04-15 02:33:12,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:12,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:12,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:12,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:12,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:12,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:12,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:12,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920614152] [2021-04-15 02:33:12,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:12,858 INFO L87 Difference]: Start difference. First operand 44984 states and 151751 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:13,169 INFO L93 Difference]: Finished difference Result 48063 states and 161244 transitions. [2021-04-15 02:33:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:13,263 INFO L225 Difference]: With dead ends: 48063 [2021-04-15 02:33:13,263 INFO L226 Difference]: Without dead ends: 48057 [2021-04-15 02:33:13,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:13,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2021-04-15 02:33:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 45252. [2021-04-15 02:33:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45251 states have (on average 3.37426797197852) internal successors, (152689), 45251 states have internal predecessors, (152689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 152689 transitions. [2021-04-15 02:33:14,261 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 152689 transitions. Word has length 22 [2021-04-15 02:33:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:14,261 INFO L480 AbstractCegarLoop]: Abstraction has 45252 states and 152689 transitions. [2021-04-15 02:33:14,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 152689 transitions. [2021-04-15 02:33:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:14,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:14,271 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:14,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24706 [2021-04-15 02:33:14,471 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:14,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:14,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1530207324, now seen corresponding path program 289 times [2021-04-15 02:33:14,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:14,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129708416] [2021-04-15 02:33:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129708416] [2021-04-15 02:33:14,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570063212] [2021-04-15 02:33:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:14,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:14,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:14,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954259784] [2021-04-15 02:33:14,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:14,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:14,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:14,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:14,618 INFO L87 Difference]: Start difference. First operand 45252 states and 152689 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:15,179 INFO L93 Difference]: Finished difference Result 45494 states and 153120 transitions. [2021-04-15 02:33:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:15,263 INFO L225 Difference]: With dead ends: 45494 [2021-04-15 02:33:15,264 INFO L226 Difference]: Without dead ends: 45494 [2021-04-15 02:33:15,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:33:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45494 states. [2021-04-15 02:33:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45494 to 45247. [2021-04-15 02:33:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.37428722981037) internal successors, (152673), 45246 states have internal predecessors, (152673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152673 transitions. [2021-04-15 02:33:15,973 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152673 transitions. Word has length 22 [2021-04-15 02:33:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:15,973 INFO L480 AbstractCegarLoop]: Abstraction has 45247 states and 152673 transitions. [2021-04-15 02:33:15,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152673 transitions. [2021-04-15 02:33:15,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:15,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:15,983 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:16,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24707,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:16,183 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1755790749, now seen corresponding path program 290 times [2021-04-15 02:33:16,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:16,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022309643] [2021-04-15 02:33:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022309643] [2021-04-15 02:33:16,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253706061] [2021-04-15 02:33:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:16,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:16,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:16,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:16,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:16,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:16,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364695323] [2021-04-15 02:33:16,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:16,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:16,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:16,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:16,338 INFO L87 Difference]: Start difference. First operand 45247 states and 152673 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:16,885 INFO L93 Difference]: Finished difference Result 45858 states and 154285 transitions. [2021-04-15 02:33:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:33:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:16,974 INFO L225 Difference]: With dead ends: 45858 [2021-04-15 02:33:16,975 INFO L226 Difference]: Without dead ends: 45851 [2021-04-15 02:33:16,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-04-15 02:33:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 45247. [2021-04-15 02:33:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.374265128409141) internal successors, (152672), 45246 states have internal predecessors, (152672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152672 transitions. [2021-04-15 02:33:17,959 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152672 transitions. Word has length 22 [2021-04-15 02:33:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:17,959 INFO L480 AbstractCegarLoop]: Abstraction has 45247 states and 152672 transitions. [2021-04-15 02:33:17,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152672 transitions. [2021-04-15 02:33:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:17,968 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:17,968 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:18,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24708,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,169 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1497302794, now seen corresponding path program 291 times [2021-04-15 02:33:18,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:18,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567579355] [2021-04-15 02:33:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567579355] [2021-04-15 02:33:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741322881] [2021-04-15 02:33:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:18,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:33:18,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:18,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:18,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:18,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177447370] [2021-04-15 02:33:18,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:18,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:18,331 INFO L87 Difference]: Start difference. First operand 45247 states and 152672 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:18,654 INFO L93 Difference]: Finished difference Result 45606 states and 153527 transitions. [2021-04-15 02:33:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:18,736 INFO L225 Difference]: With dead ends: 45606 [2021-04-15 02:33:18,736 INFO L226 Difference]: Without dead ends: 45606 [2021-04-15 02:33:18,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45606 states. [2021-04-15 02:33:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45606 to 45419. [2021-04-15 02:33:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.3728697873089963) internal successors, (153189), 45418 states have internal predecessors, (153189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153189 transitions. [2021-04-15 02:33:19,607 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153189 transitions. Word has length 22 [2021-04-15 02:33:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:19,607 INFO L480 AbstractCegarLoop]: Abstraction has 45419 states and 153189 transitions. [2021-04-15 02:33:19,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153189 transitions. [2021-04-15 02:33:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:19,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:19,616 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:19,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24709,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,816 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1331479513, now seen corresponding path program 292 times [2021-04-15 02:33:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991484474] [2021-04-15 02:33:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991484474] [2021-04-15 02:33:19,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013090633] [2021-04-15 02:33:19,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:19,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:19,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:19,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:19,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:19,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225739132] [2021-04-15 02:33:19,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:19,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:19,970 INFO L87 Difference]: Start difference. First operand 45419 states and 153189 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:20,247 INFO L93 Difference]: Finished difference Result 46001 states and 154730 transitions. [2021-04-15 02:33:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:33:20,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:20,331 INFO L225 Difference]: With dead ends: 46001 [2021-04-15 02:33:20,331 INFO L226 Difference]: Without dead ends: 45993 [2021-04-15 02:33:20,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45993 states. [2021-04-15 02:33:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45993 to 45419. [2021-04-15 02:33:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.372847769606764) internal successors, (153188), 45418 states have internal predecessors, (153188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153188 transitions. [2021-04-15 02:33:21,219 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153188 transitions. Word has length 22 [2021-04-15 02:33:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:21,219 INFO L480 AbstractCegarLoop]: Abstraction has 45419 states and 153188 transitions. [2021-04-15 02:33:21,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153188 transitions. [2021-04-15 02:33:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:21,229 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:21,229 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:21,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24710 [2021-04-15 02:33:21,429 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash 860835940, now seen corresponding path program 293 times [2021-04-15 02:33:21,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:21,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421038515] [2021-04-15 02:33:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421038515] [2021-04-15 02:33:21,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913135717] [2021-04-15 02:33:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:21,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:33:21,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:21,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:21,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:21,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:21,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:21,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976727406] [2021-04-15 02:33:21,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:21,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:21,582 INFO L87 Difference]: Start difference. First operand 45419 states and 153188 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:21,962 INFO L93 Difference]: Finished difference Result 45708 states and 153807 transitions. [2021-04-15 02:33:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:33:21,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:22,045 INFO L225 Difference]: With dead ends: 45708 [2021-04-15 02:33:22,045 INFO L226 Difference]: Without dead ends: 45708 [2021-04-15 02:33:22,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:33:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45708 states. [2021-04-15 02:33:22,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45708 to 45500. [2021-04-15 02:33:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372184004044045) internal successors, (153431), 45499 states have internal predecessors, (153431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153431 transitions. [2021-04-15 02:33:23,013 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153431 transitions. Word has length 22 [2021-04-15 02:33:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:23,013 INFO L480 AbstractCegarLoop]: Abstraction has 45500 states and 153431 transitions. [2021-04-15 02:33:23,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153431 transitions. [2021-04-15 02:33:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:23,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:23,023 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:23,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24711,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,223 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1062733085, now seen corresponding path program 294 times [2021-04-15 02:33:23,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:23,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541332867] [2021-04-15 02:33:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541332867] [2021-04-15 02:33:23,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552198196] [2021-04-15 02:33:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:23,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:33:23,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:23,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:23,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:23,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229917505] [2021-04-15 02:33:23,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:23,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:23,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:23,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:23,385 INFO L87 Difference]: Start difference. First operand 45500 states and 153431 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:23,701 INFO L93 Difference]: Finished difference Result 46053 states and 154900 transitions. [2021-04-15 02:33:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:33:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:23,793 INFO L225 Difference]: With dead ends: 46053 [2021-04-15 02:33:23,793 INFO L226 Difference]: Without dead ends: 46044 [2021-04-15 02:33:23,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46044 states. [2021-04-15 02:33:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46044 to 45500. [2021-04-15 02:33:24,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372162025539023) internal successors, (153430), 45499 states have internal predecessors, (153430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153430 transitions. [2021-04-15 02:33:24,715 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153430 transitions. Word has length 22 [2021-04-15 02:33:24,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:24,716 INFO L480 AbstractCegarLoop]: Abstraction has 45500 states and 153430 transitions. [2021-04-15 02:33:24,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:24,716 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153430 transitions. [2021-04-15 02:33:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:24,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:24,726 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:24,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24712 [2021-04-15 02:33:24,926 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1689767350, now seen corresponding path program 295 times [2021-04-15 02:33:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:24,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348492347] [2021-04-15 02:33:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:25,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348492347] [2021-04-15 02:33:25,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639430512] [2021-04-15 02:33:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:25,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:25,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:25,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690520048] [2021-04-15 02:33:25,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:25,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:25,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:25,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:25,089 INFO L87 Difference]: Start difference. First operand 45500 states and 153430 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:25,828 INFO L93 Difference]: Finished difference Result 45887 states and 154289 transitions. [2021-04-15 02:33:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 02:33:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:25,912 INFO L225 Difference]: With dead ends: 45887 [2021-04-15 02:33:25,912 INFO L226 Difference]: Without dead ends: 45887 [2021-04-15 02:33:25,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:33:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45887 states. [2021-04-15 02:33:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45887 to 45536. [2021-04-15 02:33:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.371867794004612) internal successors, (153538), 45535 states have internal predecessors, (153538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153538 transitions. [2021-04-15 02:33:26,659 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153538 transitions. Word has length 22 [2021-04-15 02:33:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:26,659 INFO L480 AbstractCegarLoop]: Abstraction has 45536 states and 153538 transitions. [2021-04-15 02:33:26,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153538 transitions. [2021-04-15 02:33:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:26,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:26,669 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:26,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24713 [2021-04-15 02:33:26,870 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1321528409, now seen corresponding path program 296 times [2021-04-15 02:33:26,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:26,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477984063] [2021-04-15 02:33:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:27,124 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 02:33:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477984063] [2021-04-15 02:33:27,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859020565] [2021-04-15 02:33:27,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:27,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:27,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:27,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004245839] [2021-04-15 02:33:27,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:27,214 INFO L87 Difference]: Start difference. First operand 45536 states and 153538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:27,504 INFO L93 Difference]: Finished difference Result 46048 states and 154924 transitions. [2021-04-15 02:33:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:33:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:27,586 INFO L225 Difference]: With dead ends: 46048 [2021-04-15 02:33:27,586 INFO L226 Difference]: Without dead ends: 46038 [2021-04-15 02:33:27,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:33:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46038 states. [2021-04-15 02:33:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46038 to 45536. [2021-04-15 02:33:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.3718458328758096) internal successors, (153537), 45535 states have internal predecessors, (153537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153537 transitions. [2021-04-15 02:33:28,507 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153537 transitions. Word has length 22 [2021-04-15 02:33:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:28,507 INFO L480 AbstractCegarLoop]: Abstraction has 45536 states and 153537 transitions. [2021-04-15 02:33:28,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153537 transitions. [2021-04-15 02:33:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:28,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:28,517 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:28,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24714 [2021-04-15 02:33:28,717 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash 845909284, now seen corresponding path program 297 times [2021-04-15 02:33:28,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:28,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080917719] [2021-04-15 02:33:28,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080917719] [2021-04-15 02:33:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082939090] [2021-04-15 02:33:28,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:28,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:33:28,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:28,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:28,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-04-15 02:33:28,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958149930] [2021-04-15 02:33:28,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:28,882 INFO L87 Difference]: Start difference. First operand 45536 states and 153537 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:29,387 INFO L93 Difference]: Finished difference Result 46288 states and 155435 transitions. [2021-04-15 02:33:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 02:33:29,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:29,470 INFO L225 Difference]: With dead ends: 46288 [2021-04-15 02:33:29,470 INFO L226 Difference]: Without dead ends: 46288 [2021-04-15 02:33:29,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 02:33:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46288 states. [2021-04-15 02:33:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46288 to 45559. [2021-04-15 02:33:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45559 states, 45558 states have (on average 3.371658106150402) internal successors, (153606), 45558 states have internal predecessors, (153606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45559 states to 45559 states and 153606 transitions. [2021-04-15 02:33:30,334 INFO L78 Accepts]: Start accepts. Automaton has 45559 states and 153606 transitions. Word has length 22 [2021-04-15 02:33:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:30,334 INFO L480 AbstractCegarLoop]: Abstraction has 45559 states and 153606 transitions. [2021-04-15 02:33:30,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 45559 states and 153606 transitions. [2021-04-15 02:33:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:30,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:30,345 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:30,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24715,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:30,545 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash -141325697, now seen corresponding path program 298 times [2021-04-15 02:33:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:30,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546948587] [2021-04-15 02:33:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546948587] [2021-04-15 02:33:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231646537] [2021-04-15 02:33:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:30,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:30,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:33:30,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889712969] [2021-04-15 02:33:30,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:30,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:30,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:30,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:30,703 INFO L87 Difference]: Start difference. First operand 45559 states and 153606 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:30,981 INFO L93 Difference]: Finished difference Result 45869 states and 154129 transitions. [2021-04-15 02:33:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:33:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:31,067 INFO L225 Difference]: With dead ends: 45869 [2021-04-15 02:33:31,067 INFO L226 Difference]: Without dead ends: 45869 [2021-04-15 02:33:31,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:33:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2021-04-15 02:33:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 45461. [2021-04-15 02:33:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45461 states, 45460 states have (on average 3.3717553893532775) internal successors, (153280), 45460 states have internal predecessors, (153280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45461 states to 45461 states and 153280 transitions. [2021-04-15 02:33:32,048 INFO L78 Accepts]: Start accepts. Automaton has 45461 states and 153280 transitions. Word has length 22 [2021-04-15 02:33:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:32,048 INFO L480 AbstractCegarLoop]: Abstraction has 45461 states and 153280 transitions. [2021-04-15 02:33:32,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45461 states and 153280 transitions. [2021-04-15 02:33:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:32,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:32,058 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:32,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24716 [2021-04-15 02:33:32,259 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash -919069942, now seen corresponding path program 299 times [2021-04-15 02:33:32,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:32,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370030288] [2021-04-15 02:33:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370030288] [2021-04-15 02:33:32,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350531240] [2021-04-15 02:33:32,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:33:32,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:33:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:32,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:32,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:32,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-04-15 02:33:32,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294617194] [2021-04-15 02:33:32,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:33:32,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:33:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:33:32,446 INFO L87 Difference]: Start difference. First operand 45461 states and 153280 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:32,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:32,887 INFO L93 Difference]: Finished difference Result 45757 states and 153693 transitions. [2021-04-15 02:33:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:33:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:32,977 INFO L225 Difference]: With dead ends: 45757 [2021-04-15 02:33:32,977 INFO L226 Difference]: Without dead ends: 45753 [2021-04-15 02:33:32,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:33:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45753 states. [2021-04-15 02:33:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45753 to 45416. [2021-04-15 02:33:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.3715952879004734) internal successors, (153121), 45415 states have internal predecessors, (153121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153121 transitions. [2021-04-15 02:33:33,966 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153121 transitions. Word has length 22 [2021-04-15 02:33:33,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:33,966 INFO L480 AbstractCegarLoop]: Abstraction has 45416 states and 153121 transitions. [2021-04-15 02:33:33,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:33,966 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153121 transitions. [2021-04-15 02:33:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:33,976 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:33,977 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:34,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24717,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:34,177 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash 931954525, now seen corresponding path program 300 times [2021-04-15 02:33:34,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:34,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179945327] [2021-04-15 02:33:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179945327] [2021-04-15 02:33:34,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080151313] [2021-04-15 02:33:34,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:34,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:34,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:34,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:34,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570742087] [2021-04-15 02:33:34,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:34,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:34,344 INFO L87 Difference]: Start difference. First operand 45416 states and 153121 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:34,894 INFO L93 Difference]: Finished difference Result 45997 states and 154677 transitions. [2021-04-15 02:33:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:34,988 INFO L225 Difference]: With dead ends: 45997 [2021-04-15 02:33:34,988 INFO L226 Difference]: Without dead ends: 45990 [2021-04-15 02:33:34,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:35,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45990 states. [2021-04-15 02:33:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45990 to 45416. [2021-04-15 02:33:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.371573268743807) internal successors, (153120), 45415 states have internal predecessors, (153120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153120 transitions. [2021-04-15 02:33:35,770 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153120 transitions. Word has length 22 [2021-04-15 02:33:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:35,770 INFO L480 AbstractCegarLoop]: Abstraction has 45416 states and 153120 transitions. [2021-04-15 02:33:35,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153120 transitions. [2021-04-15 02:33:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:35,781 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:35,781 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:35,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24718,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:35,981 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 673466570, now seen corresponding path program 301 times [2021-04-15 02:33:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:35,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265048211] [2021-04-15 02:33:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265048211] [2021-04-15 02:33:36,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218693253] [2021-04-15 02:33:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:36,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:36,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132174549] [2021-04-15 02:33:36,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:36,325 INFO L87 Difference]: Start difference. First operand 45416 states and 153120 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:36,980 INFO L93 Difference]: Finished difference Result 53135 states and 176578 transitions. [2021-04-15 02:33:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 02:33:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:37,085 INFO L225 Difference]: With dead ends: 53135 [2021-04-15 02:33:37,085 INFO L226 Difference]: Without dead ends: 53135 [2021-04-15 02:33:37,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:33:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53135 states. [2021-04-15 02:33:37,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53135 to 47539. [2021-04-15 02:33:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47539 states, 47538 states have (on average 3.3566199671841472) internal successors, (159567), 47538 states have internal predecessors, (159567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47539 states to 47539 states and 159567 transitions. [2021-04-15 02:33:37,990 INFO L78 Accepts]: Start accepts. Automaton has 47539 states and 159567 transitions. Word has length 22 [2021-04-15 02:33:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:37,990 INFO L480 AbstractCegarLoop]: Abstraction has 47539 states and 159567 transitions. [2021-04-15 02:33:37,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 47539 states and 159567 transitions. [2021-04-15 02:33:38,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:38,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:38,001 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:38,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24719,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,201 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1618648765, now seen corresponding path program 302 times [2021-04-15 02:33:38,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:38,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843621554] [2021-04-15 02:33:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:38,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843621554] [2021-04-15 02:33:38,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924558669] [2021-04-15 02:33:38,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:38,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:38,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:38,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:38,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270344524] [2021-04-15 02:33:38,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:38,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:38,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:38,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:38,359 INFO L87 Difference]: Start difference. First operand 47539 states and 159567 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:38,700 INFO L93 Difference]: Finished difference Result 48476 states and 162116 transitions. [2021-04-15 02:33:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:38,788 INFO L225 Difference]: With dead ends: 48476 [2021-04-15 02:33:38,788 INFO L226 Difference]: Without dead ends: 48469 [2021-04-15 02:33:38,788 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48469 states. [2021-04-15 02:33:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48469 to 47569. [2021-04-15 02:33:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47569 states, 47568 states have (on average 3.3566473259334004) internal successors, (159669), 47568 states have internal predecessors, (159669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47569 states to 47569 states and 159669 transitions. [2021-04-15 02:33:39,749 INFO L78 Accepts]: Start accepts. Automaton has 47569 states and 159669 transitions. Word has length 22 [2021-04-15 02:33:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:39,749 INFO L480 AbstractCegarLoop]: Abstraction has 47569 states and 159669 transitions. [2021-04-15 02:33:39,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 47569 states and 159669 transitions. [2021-04-15 02:33:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:39,760 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:39,760 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:39,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24720 [2021-04-15 02:33:39,960 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1877136720, now seen corresponding path program 303 times [2021-04-15 02:33:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:39,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128447485] [2021-04-15 02:33:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128447485] [2021-04-15 02:33:40,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254327914] [2021-04-15 02:33:40,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:40,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:33:40,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:40,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:40,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:40,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:40,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370376299] [2021-04-15 02:33:40,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:40,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:40,135 INFO L87 Difference]: Start difference. First operand 47569 states and 159669 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:41,040 INFO L93 Difference]: Finished difference Result 49325 states and 164443 transitions. [2021-04-15 02:33:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:33:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:41,132 INFO L225 Difference]: With dead ends: 49325 [2021-04-15 02:33:41,132 INFO L226 Difference]: Without dead ends: 49325 [2021-04-15 02:33:41,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=862, Invalid=1688, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 02:33:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49325 states. [2021-04-15 02:33:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49325 to 47248. [2021-04-15 02:33:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.3590915825343406) internal successors, (158707), 47247 states have internal predecessors, (158707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158707 transitions. [2021-04-15 02:33:41,848 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158707 transitions. Word has length 22 [2021-04-15 02:33:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:41,848 INFO L480 AbstractCegarLoop]: Abstraction has 47248 states and 158707 transitions. [2021-04-15 02:33:41,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158707 transitions. [2021-04-15 02:33:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:41,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:41,858 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:42,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24721 [2021-04-15 02:33:42,059 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2042960001, now seen corresponding path program 304 times [2021-04-15 02:33:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:42,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667114058] [2021-04-15 02:33:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:42,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667114058] [2021-04-15 02:33:42,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470284389] [2021-04-15 02:33:42,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:42,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:42,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:42,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637971626] [2021-04-15 02:33:42,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:42,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:42,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:42,462 INFO L87 Difference]: Start difference. First operand 47248 states and 158707 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:42,807 INFO L93 Difference]: Finished difference Result 47656 states and 159788 transitions. [2021-04-15 02:33:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:42,906 INFO L225 Difference]: With dead ends: 47656 [2021-04-15 02:33:42,906 INFO L226 Difference]: Without dead ends: 47648 [2021-04-15 02:33:42,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47648 states. [2021-04-15 02:33:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47648 to 47248. [2021-04-15 02:33:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.359070417169344) internal successors, (158706), 47247 states have internal predecessors, (158706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158706 transitions. [2021-04-15 02:33:43,931 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158706 transitions. Word has length 22 [2021-04-15 02:33:43,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:43,931 INFO L480 AbstractCegarLoop]: Abstraction has 47248 states and 158706 transitions. [2021-04-15 02:33:43,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158706 transitions. [2021-04-15 02:33:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:43,942 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:43,942 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24722 [2021-04-15 02:33:44,143 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1781363722, now seen corresponding path program 305 times [2021-04-15 02:33:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649377715] [2021-04-15 02:33:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649377715] [2021-04-15 02:33:44,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131932034] [2021-04-15 02:33:44,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:44,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:33:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:44,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:44,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:44,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:44,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383514417] [2021-04-15 02:33:44,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:44,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:44,324 INFO L87 Difference]: Start difference. First operand 47248 states and 158706 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:45,003 INFO L93 Difference]: Finished difference Result 49120 states and 163790 transitions. [2021-04-15 02:33:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:33:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:45,093 INFO L225 Difference]: With dead ends: 49120 [2021-04-15 02:33:45,093 INFO L226 Difference]: Without dead ends: 49120 [2021-04-15 02:33:45,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=1014, Invalid=2066, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:33:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49120 states. [2021-04-15 02:33:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49120 to 47283. [2021-04-15 02:33:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47283 states, 47282 states have (on average 3.3595448585085235) internal successors, (158846), 47282 states have internal predecessors, (158846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47283 states to 47283 states and 158846 transitions. [2021-04-15 02:33:46,013 INFO L78 Accepts]: Start accepts. Automaton has 47283 states and 158846 transitions. Word has length 22 [2021-04-15 02:33:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:46,013 INFO L480 AbstractCegarLoop]: Abstraction has 47283 states and 158846 transitions. [2021-04-15 02:33:46,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 47283 states and 158846 transitions. [2021-04-15 02:33:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:46,024 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:46,024 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:46,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24723 [2021-04-15 02:33:46,225 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:46,225 INFO L82 PathProgramCache]: Analyzing trace with hash 917027869, now seen corresponding path program 306 times [2021-04-15 02:33:46,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:46,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964103478] [2021-04-15 02:33:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964103478] [2021-04-15 02:33:46,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241387027] [2021-04-15 02:33:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:46,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:46,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:46,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:46,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:46,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:46,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525750857] [2021-04-15 02:33:46,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:46,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:46,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:46,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:46,388 INFO L87 Difference]: Start difference. First operand 47283 states and 158846 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:46,736 INFO L93 Difference]: Finished difference Result 48602 states and 162549 transitions. [2021-04-15 02:33:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:46,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:46,825 INFO L225 Difference]: With dead ends: 48602 [2021-04-15 02:33:46,825 INFO L226 Difference]: Without dead ends: 48595 [2021-04-15 02:33:46,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48595 states. [2021-04-15 02:33:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48595 to 47301. [2021-04-15 02:33:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47301 states, 47300 states have (on average 3.3595771670190273) internal successors, (158908), 47300 states have internal predecessors, (158908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47301 states to 47301 states and 158908 transitions. [2021-04-15 02:33:47,848 INFO L78 Accepts]: Start accepts. Automaton has 47301 states and 158908 transitions. Word has length 22 [2021-04-15 02:33:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:47,848 INFO L480 AbstractCegarLoop]: Abstraction has 47301 states and 158908 transitions. [2021-04-15 02:33:47,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47301 states and 158908 transitions. [2021-04-15 02:33:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:47,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:47,858 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:48,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24724 [2021-04-15 02:33:48,059 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 658539914, now seen corresponding path program 307 times [2021-04-15 02:33:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:48,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276434567] [2021-04-15 02:33:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:48,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276434567] [2021-04-15 02:33:48,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691211512] [2021-04-15 02:33:48,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:48,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:48,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:48,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:48,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936706919] [2021-04-15 02:33:48,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:48,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:48,230 INFO L87 Difference]: Start difference. First operand 47301 states and 158908 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:48,975 INFO L93 Difference]: Finished difference Result 47967 states and 160441 transitions. [2021-04-15 02:33:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 02:33:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:49,062 INFO L225 Difference]: With dead ends: 47967 [2021-04-15 02:33:49,062 INFO L226 Difference]: Without dead ends: 47967 [2021-04-15 02:33:49,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=765, Invalid=1491, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 02:33:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47967 states. [2021-04-15 02:33:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47967 to 47235. [2021-04-15 02:33:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.360291315577762) internal successors, (158720), 47234 states have internal predecessors, (158720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158720 transitions. [2021-04-15 02:33:50,055 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158720 transitions. Word has length 22 [2021-04-15 02:33:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:50,055 INFO L480 AbstractCegarLoop]: Abstraction has 47235 states and 158720 transitions. [2021-04-15 02:33:50,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158720 transitions. [2021-04-15 02:33:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:50,066 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:50,066 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:50,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24725 [2021-04-15 02:33:50,266 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 492716633, now seen corresponding path program 308 times [2021-04-15 02:33:50,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:50,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343845077] [2021-04-15 02:33:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343845077] [2021-04-15 02:33:50,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654980198] [2021-04-15 02:33:50,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:50,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:33:50,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:50,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:50,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:50,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092260005] [2021-04-15 02:33:50,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:50,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:50,440 INFO L87 Difference]: Start difference. First operand 47235 states and 158720 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:50,765 INFO L93 Difference]: Finished difference Result 47714 states and 159972 transitions. [2021-04-15 02:33:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:33:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:50,854 INFO L225 Difference]: With dead ends: 47714 [2021-04-15 02:33:50,854 INFO L226 Difference]: Without dead ends: 47706 [2021-04-15 02:33:50,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47706 states. [2021-04-15 02:33:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47706 to 47235. [2021-04-15 02:33:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.3602701443875174) internal successors, (158719), 47234 states have internal predecessors, (158719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158719 transitions. [2021-04-15 02:33:51,809 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158719 transitions. Word has length 22 [2021-04-15 02:33:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:51,809 INFO L480 AbstractCegarLoop]: Abstraction has 47235 states and 158719 transitions. [2021-04-15 02:33:51,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158719 transitions. [2021-04-15 02:33:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:51,820 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:51,820 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:52,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24726,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,021 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 22073060, now seen corresponding path program 309 times [2021-04-15 02:33:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:52,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868905866] [2021-04-15 02:33:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:52,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868905866] [2021-04-15 02:33:52,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365894887] [2021-04-15 02:33:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:52,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:33:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:52,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:52,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:52,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691187219] [2021-04-15 02:33:52,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:52,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:52,199 INFO L87 Difference]: Start difference. First operand 47235 states and 158719 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:52,821 INFO L93 Difference]: Finished difference Result 47933 states and 160397 transitions. [2021-04-15 02:33:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 02:33:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:52,913 INFO L225 Difference]: With dead ends: 47933 [2021-04-15 02:33:52,913 INFO L226 Difference]: Without dead ends: 47933 [2021-04-15 02:33:52,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=921, Invalid=1835, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 02:33:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-04-15 02:33:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 47173. [2021-04-15 02:33:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.3607648605104723) internal successors, (158534), 47172 states have internal predecessors, (158534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158534 transitions. [2021-04-15 02:33:53,878 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158534 transitions. Word has length 22 [2021-04-15 02:33:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:53,878 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158534 transitions. [2021-04-15 02:33:53,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158534 transitions. [2021-04-15 02:33:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:53,889 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:53,889 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:54,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24727,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:54,089 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 223970205, now seen corresponding path program 310 times [2021-04-15 02:33:54,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:54,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493499625] [2021-04-15 02:33:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:54,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493499625] [2021-04-15 02:33:54,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014283892] [2021-04-15 02:33:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:54,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:33:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:54,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:54,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:54,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:54,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52694061] [2021-04-15 02:33:54,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:54,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:54,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:54,263 INFO L87 Difference]: Start difference. First operand 47173 states and 158534 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:54,595 INFO L93 Difference]: Finished difference Result 47617 states and 159719 transitions. [2021-04-15 02:33:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:33:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:54,685 INFO L225 Difference]: With dead ends: 47617 [2021-04-15 02:33:54,685 INFO L226 Difference]: Without dead ends: 47608 [2021-04-15 02:33:54,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47608 states. [2021-04-15 02:33:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47608 to 47173. [2021-04-15 02:33:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.360743661494107) internal successors, (158533), 47172 states have internal predecessors, (158533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158533 transitions. [2021-04-15 02:33:55,641 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158533 transitions. Word has length 22 [2021-04-15 02:33:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:55,641 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158533 transitions. [2021-04-15 02:33:55,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158533 transitions. [2021-04-15 02:33:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:55,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:55,652 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:55,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24728 [2021-04-15 02:33:55,857 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1766437066, now seen corresponding path program 311 times [2021-04-15 02:33:55,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:55,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14993432] [2021-04-15 02:33:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:55,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14993432] [2021-04-15 02:33:55,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625039369] [2021-04-15 02:33:55,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:55,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:33:55,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:55,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:56,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465612243] [2021-04-15 02:33:56,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:56,043 INFO L87 Difference]: Start difference. First operand 47173 states and 158533 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:56,963 INFO L93 Difference]: Finished difference Result 48412 states and 161872 transitions. [2021-04-15 02:33:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 02:33:56,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:57,051 INFO L225 Difference]: With dead ends: 48412 [2021-04-15 02:33:57,051 INFO L226 Difference]: Without dead ends: 48412 [2021-04-15 02:33:57,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=1002, Invalid=2078, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 02:33:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48412 states. [2021-04-15 02:33:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48412 to 47155. [2021-04-15 02:33:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47155 states, 47154 states have (on average 3.360881367434364) internal successors, (158479), 47154 states have internal predecessors, (158479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47155 states to 47155 states and 158479 transitions. [2021-04-15 02:33:58,033 INFO L78 Accepts]: Start accepts. Automaton has 47155 states and 158479 transitions. Word has length 22 [2021-04-15 02:33:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:58,033 INFO L480 AbstractCegarLoop]: Abstraction has 47155 states and 158479 transitions. [2021-04-15 02:33:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47155 states and 158479 transitions. [2021-04-15 02:33:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:58,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:58,044 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:58,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24729,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:58,244 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2081375101, now seen corresponding path program 312 times [2021-04-15 02:33:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:58,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565282849] [2021-04-15 02:33:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565282849] [2021-04-15 02:33:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110369737] [2021-04-15 02:33:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:58,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:33:58,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:58,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:33:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:58,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:58,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:33:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157850132] [2021-04-15 02:33:58,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:33:58,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:58,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:33:58,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:33:58,414 INFO L87 Difference]: Start difference. First operand 47155 states and 158479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:58,773 INFO L93 Difference]: Finished difference Result 49039 states and 163954 transitions. [2021-04-15 02:33:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:33:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:33:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:58,863 INFO L225 Difference]: With dead ends: 49039 [2021-04-15 02:33:58,863 INFO L226 Difference]: Without dead ends: 49032 [2021-04-15 02:33:58,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:33:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49032 states. [2021-04-15 02:33:59,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49032 to 47173. [2021-04-15 02:33:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.3609132536250317) internal successors, (158541), 47172 states have internal predecessors, (158541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158541 transitions. [2021-04-15 02:33:59,841 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158541 transitions. Word has length 22 [2021-04-15 02:33:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:59,841 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158541 transitions. [2021-04-15 02:33:59,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:59,841 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158541 transitions. [2021-04-15 02:33:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:33:59,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:59,852 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:00,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24730 [2021-04-15 02:34:00,052 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104240, now seen corresponding path program 313 times [2021-04-15 02:34:00,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:00,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374386349] [2021-04-15 02:34:00,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374386349] [2021-04-15 02:34:00,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633261008] [2021-04-15 02:34:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:00,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:00,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:00,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495734869] [2021-04-15 02:34:00,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:00,222 INFO L87 Difference]: Start difference. First operand 47173 states and 158541 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:00,738 INFO L93 Difference]: Finished difference Result 47579 states and 159437 transitions. [2021-04-15 02:34:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:34:00,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:00,828 INFO L225 Difference]: With dead ends: 47579 [2021-04-15 02:34:00,828 INFO L226 Difference]: Without dead ends: 47579 [2021-04-15 02:34:00,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=692, Invalid=1378, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:34:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47579 states. [2021-04-15 02:34:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47579 to 47191. [2021-04-15 02:34:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47191 states, 47190 states have (on average 3.3607967789785973) internal successors, (158596), 47190 states have internal predecessors, (158596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47191 states to 47191 states and 158596 transitions. [2021-04-15 02:34:01,856 INFO L78 Accepts]: Start accepts. Automaton has 47191 states and 158596 transitions. Word has length 22 [2021-04-15 02:34:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:01,856 INFO L480 AbstractCegarLoop]: Abstraction has 47191 states and 158596 transitions. [2021-04-15 02:34:01,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 47191 states and 158596 transitions. [2021-04-15 02:34:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:01,867 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:01,867 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:02,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24731 [2021-04-15 02:34:02,067 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1789280959, now seen corresponding path program 314 times [2021-04-15 02:34:02,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:02,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184180864] [2021-04-15 02:34:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:02,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184180864] [2021-04-15 02:34:02,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469669714] [2021-04-15 02:34:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:02,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:02,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:02,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:02,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:02,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:02,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709532459] [2021-04-15 02:34:02,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:02,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:02,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:02,235 INFO L87 Difference]: Start difference. First operand 47191 states and 158596 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:02,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:02,545 INFO L93 Difference]: Finished difference Result 47742 states and 160042 transitions. [2021-04-15 02:34:02,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:34:02,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:02,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:02,634 INFO L225 Difference]: With dead ends: 47742 [2021-04-15 02:34:02,635 INFO L226 Difference]: Without dead ends: 47734 [2021-04-15 02:34:02,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:34:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47734 states. [2021-04-15 02:34:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47734 to 47191. [2021-04-15 02:34:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47191 states, 47190 states have (on average 3.360775588048315) internal successors, (158595), 47190 states have internal predecessors, (158595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47191 states to 47191 states and 158595 transitions. [2021-04-15 02:34:03,641 INFO L78 Accepts]: Start accepts. Automaton has 47191 states and 158595 transitions. Word has length 22 [2021-04-15 02:34:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:03,641 INFO L480 AbstractCegarLoop]: Abstraction has 47191 states and 158595 transitions. [2021-04-15 02:34:03,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:03,641 INFO L276 IsEmpty]: Start isEmpty. Operand 47191 states and 158595 transitions. [2021-04-15 02:34:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:03,652 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:03,652 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:03,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24732 [2021-04-15 02:34:03,852 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1318637386, now seen corresponding path program 315 times [2021-04-15 02:34:03,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:03,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849163990] [2021-04-15 02:34:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849163990] [2021-04-15 02:34:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873697635] [2021-04-15 02:34:03,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:03,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:34:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:04,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:04,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:04,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902379923] [2021-04-15 02:34:04,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:04,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:04,028 INFO L87 Difference]: Start difference. First operand 47191 states and 158595 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:04,923 INFO L93 Difference]: Finished difference Result 47541 states and 159355 transitions. [2021-04-15 02:34:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 02:34:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:05,015 INFO L225 Difference]: With dead ends: 47541 [2021-04-15 02:34:05,015 INFO L226 Difference]: Without dead ends: 47541 [2021-04-15 02:34:05,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1396, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 02:34:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47541 states. [2021-04-15 02:34:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47541 to 47151. [2021-04-15 02:34:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610816542948037) internal successors, (158475), 47150 states have internal predecessors, (158475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158475 transitions. [2021-04-15 02:34:06,009 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158475 transitions. Word has length 22 [2021-04-15 02:34:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:06,009 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158475 transitions. [2021-04-15 02:34:06,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158475 transitions. [2021-04-15 02:34:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:06,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:06,020 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:06,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24733 [2021-04-15 02:34:06,221 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1520534531, now seen corresponding path program 316 times [2021-04-15 02:34:06,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:06,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375992748] [2021-04-15 02:34:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:06,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375992748] [2021-04-15 02:34:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684961231] [2021-04-15 02:34:06,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:06,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:06,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:06,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:06,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65960829] [2021-04-15 02:34:06,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:06,397 INFO L87 Difference]: Start difference. First operand 47151 states and 158475 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:06,734 INFO L93 Difference]: Finished difference Result 47675 states and 159855 transitions. [2021-04-15 02:34:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:34:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:06,827 INFO L225 Difference]: With dead ends: 47675 [2021-04-15 02:34:06,827 INFO L226 Difference]: Without dead ends: 47666 [2021-04-15 02:34:06,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:34:06,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47666 states. [2021-04-15 02:34:07,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47666 to 47151. [2021-04-15 02:34:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610604453870625) internal successors, (158474), 47150 states have internal predecessors, (158474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158474 transitions. [2021-04-15 02:34:07,757 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158474 transitions. Word has length 22 [2021-04-15 02:34:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:07,757 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158474 transitions. [2021-04-15 02:34:07,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158474 transitions. [2021-04-15 02:34:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:07,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:07,767 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:07,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24734,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:07,968 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1231965904, now seen corresponding path program 317 times [2021-04-15 02:34:07,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:07,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046166187] [2021-04-15 02:34:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:08,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046166187] [2021-04-15 02:34:08,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721026482] [2021-04-15 02:34:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:08,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:34:08,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:08,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:08,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:08,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:08,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976318446] [2021-04-15 02:34:08,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:08,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:08,149 INFO L87 Difference]: Start difference. First operand 47151 states and 158474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:08,753 INFO L93 Difference]: Finished difference Result 47706 states and 159825 transitions. [2021-04-15 02:34:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 02:34:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:08,837 INFO L225 Difference]: With dead ends: 47706 [2021-04-15 02:34:08,837 INFO L226 Difference]: Without dead ends: 47706 [2021-04-15 02:34:08,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 02:34:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47706 states. [2021-04-15 02:34:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47706 to 47150. [2021-04-15 02:34:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47150 states, 47149 states have (on average 3.3610681032471525) internal successors, (158471), 47149 states have internal predecessors, (158471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47150 states to 47150 states and 158471 transitions. [2021-04-15 02:34:09,735 INFO L78 Accepts]: Start accepts. Automaton has 47150 states and 158471 transitions. Word has length 22 [2021-04-15 02:34:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:09,735 INFO L480 AbstractCegarLoop]: Abstraction has 47150 states and 158471 transitions. [2021-04-15 02:34:09,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 47150 states and 158471 transitions. [2021-04-15 02:34:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:09,746 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:09,746 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:09,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24735 [2021-04-15 02:34:09,946 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1779329855, now seen corresponding path program 318 times [2021-04-15 02:34:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:09,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219778409] [2021-04-15 02:34:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219778409] [2021-04-15 02:34:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755770313] [2021-04-15 02:34:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:10,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:34:10,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:10,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:10,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:10,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:10,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:10,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390527120] [2021-04-15 02:34:10,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:10,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:10,126 INFO L87 Difference]: Start difference. First operand 47150 states and 158471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:10,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:10,442 INFO L93 Difference]: Finished difference Result 47635 states and 159774 transitions. [2021-04-15 02:34:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:34:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:10,530 INFO L225 Difference]: With dead ends: 47635 [2021-04-15 02:34:10,530 INFO L226 Difference]: Without dead ends: 47625 [2021-04-15 02:34:10,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:34:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47625 states. [2021-04-15 02:34:11,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47625 to 47150. [2021-04-15 02:34:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47150 states, 47149 states have (on average 3.361046893889584) internal successors, (158470), 47149 states have internal predecessors, (158470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47150 states to 47150 states and 158470 transitions. [2021-04-15 02:34:11,449 INFO L78 Accepts]: Start accepts. Automaton has 47150 states and 158470 transitions. Word has length 22 [2021-04-15 02:34:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:11,449 INFO L480 AbstractCegarLoop]: Abstraction has 47150 states and 158470 transitions. [2021-04-15 02:34:11,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47150 states and 158470 transitions. [2021-04-15 02:34:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:11,459 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:11,459 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:11,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24736 [2021-04-15 02:34:11,660 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1303710730, now seen corresponding path program 319 times [2021-04-15 02:34:11,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:11,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166761620] [2021-04-15 02:34:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:11,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166761620] [2021-04-15 02:34:11,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231776618] [2021-04-15 02:34:11,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:11,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:11,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:11,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:11,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-04-15 02:34:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54007501] [2021-04-15 02:34:11,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:11,847 INFO L87 Difference]: Start difference. First operand 47150 states and 158470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:12,586 INFO L93 Difference]: Finished difference Result 47789 states and 160069 transitions. [2021-04-15 02:34:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:34:12,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:12,675 INFO L225 Difference]: With dead ends: 47789 [2021-04-15 02:34:12,675 INFO L226 Difference]: Without dead ends: 47789 [2021-04-15 02:34:12,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=796, Invalid=1654, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:34:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47789 states. [2021-04-15 02:34:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47789 to 47151. [2021-04-15 02:34:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610392364793213) internal successors, (158473), 47150 states have internal predecessors, (158473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158473 transitions. [2021-04-15 02:34:13,643 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158473 transitions. Word has length 22 [2021-04-15 02:34:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:13,643 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158473 transitions. [2021-04-15 02:34:13,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158473 transitions. [2021-04-15 02:34:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:13,654 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:13,654 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:13,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24737,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,854 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:13,854 INFO L82 PathProgramCache]: Analyzing trace with hash 79134407, now seen corresponding path program 320 times [2021-04-15 02:34:13,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:13,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598348633] [2021-04-15 02:34:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:13,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598348633] [2021-04-15 02:34:13,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884056695] [2021-04-15 02:34:13,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:13,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:13,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:14,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:14,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:34:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732415067] [2021-04-15 02:34:14,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:34:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:34:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:34:14,030 INFO L87 Difference]: Start difference. First operand 47151 states and 158473 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:14,264 INFO L93 Difference]: Finished difference Result 47659 states and 159370 transitions. [2021-04-15 02:34:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:34:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:14,352 INFO L225 Difference]: With dead ends: 47659 [2021-04-15 02:34:14,353 INFO L226 Difference]: Without dead ends: 47659 [2021-04-15 02:34:14,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47659 states. [2021-04-15 02:34:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47659 to 47163. [2021-04-15 02:34:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47163 states, 47162 states have (on average 3.361180611509266) internal successors, (158520), 47162 states have internal predecessors, (158520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47163 states to 47163 states and 158520 transitions. [2021-04-15 02:34:15,329 INFO L78 Accepts]: Start accepts. Automaton has 47163 states and 158520 transitions. Word has length 22 [2021-04-15 02:34:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:15,329 INFO L480 AbstractCegarLoop]: Abstraction has 47163 states and 158520 transitions. [2021-04-15 02:34:15,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 47163 states and 158520 transitions. [2021-04-15 02:34:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:15,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:15,340 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:15,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24738,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:15,541 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1162424540, now seen corresponding path program 321 times [2021-04-15 02:34:15,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:15,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329934275] [2021-04-15 02:34:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329934275] [2021-04-15 02:34:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056565786] [2021-04-15 02:34:15,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:15,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:34:15,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:15,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:15,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:15,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:34:15,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011828746] [2021-04-15 02:34:15,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:34:15,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:34:15,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:34:15,708 INFO L87 Difference]: Start difference. First operand 47163 states and 158520 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:16,092 INFO L93 Difference]: Finished difference Result 52455 states and 175524 transitions. [2021-04-15 02:34:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:34:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:16,197 INFO L225 Difference]: With dead ends: 52455 [2021-04-15 02:34:16,197 INFO L226 Difference]: Without dead ends: 52453 [2021-04-15 02:34:16,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:34:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52453 states. [2021-04-15 02:34:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52453 to 52239. [2021-04-15 02:34:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52239 states, 52238 states have (on average 3.355009763007772) internal successors, (175259), 52238 states have internal predecessors, (175259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52239 states to 52239 states and 175259 transitions. [2021-04-15 02:34:17,259 INFO L78 Accepts]: Start accepts. Automaton has 52239 states and 175259 transitions. Word has length 22 [2021-04-15 02:34:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:17,260 INFO L480 AbstractCegarLoop]: Abstraction has 52239 states and 175259 transitions. [2021-04-15 02:34:17,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 52239 states and 175259 transitions. [2021-04-15 02:34:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:17,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:17,271 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:17,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24739,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:17,471 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1819226717, now seen corresponding path program 322 times [2021-04-15 02:34:17,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:17,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814719363] [2021-04-15 02:34:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:17,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814719363] [2021-04-15 02:34:17,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612330821] [2021-04-15 02:34:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:17,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:17,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:17,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:34:17,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178494062] [2021-04-15 02:34:17,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:34:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:34:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:34:17,628 INFO L87 Difference]: Start difference. First operand 52239 states and 175259 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:17,989 INFO L93 Difference]: Finished difference Result 52643 states and 175881 transitions. [2021-04-15 02:34:17,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:34:17,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:18,409 INFO L225 Difference]: With dead ends: 52643 [2021-04-15 02:34:18,409 INFO L226 Difference]: Without dead ends: 52642 [2021-04-15 02:34:18,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:34:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52642 states. [2021-04-15 02:34:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52642 to 52239. [2021-04-15 02:34:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52239 states, 52238 states have (on average 3.3549906198552777) internal successors, (175258), 52238 states have internal predecessors, (175258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52239 states to 52239 states and 175258 transitions. [2021-04-15 02:34:19,497 INFO L78 Accepts]: Start accepts. Automaton has 52239 states and 175258 transitions. Word has length 22 [2021-04-15 02:34:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:19,497 INFO L480 AbstractCegarLoop]: Abstraction has 52239 states and 175258 transitions. [2021-04-15 02:34:19,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 52239 states and 175258 transitions. [2021-04-15 02:34:19,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:19,508 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:19,508 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:19,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24740 [2021-04-15 02:34:19,713 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:19,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:19,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1553321846, now seen corresponding path program 323 times [2021-04-15 02:34:19,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:19,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005104002] [2021-04-15 02:34:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:19,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005104002] [2021-04-15 02:34:19,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422755581] [2021-04-15 02:34:19,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:19,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:34:19,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:19,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:19,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-04-15 02:34:19,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896065683] [2021-04-15 02:34:19,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 02:34:19,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:19,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 02:34:19,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:34:19,892 INFO L87 Difference]: Start difference. First operand 52239 states and 175258 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:20,245 INFO L93 Difference]: Finished difference Result 52789 states and 176524 transitions. [2021-04-15 02:34:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:34:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:20,354 INFO L225 Difference]: With dead ends: 52789 [2021-04-15 02:34:20,355 INFO L226 Difference]: Without dead ends: 52789 [2021-04-15 02:34:20,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:34:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52789 states. [2021-04-15 02:34:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52789 to 52241. [2021-04-15 02:34:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52241 states, 52240 states have (on average 3.354977029096478) internal successors, (175264), 52240 states have internal predecessors, (175264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52241 states to 52241 states and 175264 transitions. [2021-04-15 02:34:21,396 INFO L78 Accepts]: Start accepts. Automaton has 52241 states and 175264 transitions. Word has length 22 [2021-04-15 02:34:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:21,396 INFO L480 AbstractCegarLoop]: Abstraction has 52241 states and 175264 transitions. [2021-04-15 02:34:21,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 52241 states and 175264 transitions. [2021-04-15 02:34:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:21,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:21,407 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:21,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24741 [2021-04-15 02:34:21,607 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:21,607 INFO L82 PathProgramCache]: Analyzing trace with hash -765127271, now seen corresponding path program 324 times [2021-04-15 02:34:21,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:21,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713824507] [2021-04-15 02:34:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:21,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713824507] [2021-04-15 02:34:21,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077476695] [2021-04-15 02:34:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:21,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:34:21,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 49 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:21,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:21,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:21,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574739600] [2021-04-15 02:34:21,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:21,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:21,775 INFO L87 Difference]: Start difference. First operand 52241 states and 175264 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:22,194 INFO L93 Difference]: Finished difference Result 52650 states and 175893 transitions. [2021-04-15 02:34:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 02:34:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:22,304 INFO L225 Difference]: With dead ends: 52650 [2021-04-15 02:34:22,304 INFO L226 Difference]: Without dead ends: 52648 [2021-04-15 02:34:22,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:34:22,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52648 states. [2021-04-15 02:34:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52648 to 52241. [2021-04-15 02:34:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52241 states, 52240 states have (on average 3.354957886676876) internal successors, (175263), 52240 states have internal predecessors, (175263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52241 states to 52241 states and 175263 transitions. [2021-04-15 02:34:23,427 INFO L78 Accepts]: Start accepts. Automaton has 52241 states and 175263 transitions. Word has length 22 [2021-04-15 02:34:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:23,427 INFO L480 AbstractCegarLoop]: Abstraction has 52241 states and 175263 transitions. [2021-04-15 02:34:23,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 52241 states and 175263 transitions. [2021-04-15 02:34:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:23,438 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:23,438 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:23,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24742 [2021-04-15 02:34:23,639 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:23,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:23,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1012598116, now seen corresponding path program 325 times [2021-04-15 02:34:23,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:23,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695241057] [2021-04-15 02:34:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:23,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695241057] [2021-04-15 02:34:23,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622231325] [2021-04-15 02:34:23,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:23,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:23,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:23,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263757322] [2021-04-15 02:34:23,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:23,822 INFO L87 Difference]: Start difference. First operand 52241 states and 175263 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:24,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:24,521 INFO L93 Difference]: Finished difference Result 53145 states and 177547 transitions. [2021-04-15 02:34:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:34:24,522 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:24,638 INFO L225 Difference]: With dead ends: 53145 [2021-04-15 02:34:24,638 INFO L226 Difference]: Without dead ends: 53145 [2021-04-15 02:34:24,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=378, Invalid=744, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 02:34:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53145 states. [2021-04-15 02:34:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53145 to 52267. [2021-04-15 02:34:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52267 states, 52266 states have (on average 3.3547813109861093) internal successors, (175341), 52266 states have internal predecessors, (175341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52267 states to 52267 states and 175341 transitions. [2021-04-15 02:34:25,814 INFO L78 Accepts]: Start accepts. Automaton has 52267 states and 175341 transitions. Word has length 22 [2021-04-15 02:34:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:25,814 INFO L480 AbstractCegarLoop]: Abstraction has 52267 states and 175341 transitions. [2021-04-15 02:34:25,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 52267 states and 175341 transitions. [2021-04-15 02:34:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:25,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:25,826 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:26,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24743 [2021-04-15 02:34:26,026 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 724277725, now seen corresponding path program 326 times [2021-04-15 02:34:26,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:26,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103669173] [2021-04-15 02:34:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:26,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103669173] [2021-04-15 02:34:26,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580704135] [2021-04-15 02:34:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:26,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:26,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:26,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:26,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:26,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:26,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640691232] [2021-04-15 02:34:26,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:26,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:26,203 INFO L87 Difference]: Start difference. First operand 52267 states and 175341 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:26,645 INFO L93 Difference]: Finished difference Result 62002 states and 207763 transitions. [2021-04-15 02:34:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:34:26,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:26,774 INFO L225 Difference]: With dead ends: 62002 [2021-04-15 02:34:26,774 INFO L226 Difference]: Without dead ends: 61999 [2021-04-15 02:34:26,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:34:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61999 states. [2021-04-15 02:34:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61999 to 52738. [2021-04-15 02:34:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52738 states, 52737 states have (on average 3.3552913514230993) internal successors, (176948), 52737 states have internal predecessors, (176948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52738 states to 52738 states and 176948 transitions. [2021-04-15 02:34:27,954 INFO L78 Accepts]: Start accepts. Automaton has 52738 states and 176948 transitions. Word has length 22 [2021-04-15 02:34:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:27,954 INFO L480 AbstractCegarLoop]: Abstraction has 52738 states and 176948 transitions. [2021-04-15 02:34:27,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52738 states and 176948 transitions. [2021-04-15 02:34:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:27,965 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:27,965 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:28,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24744,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:28,165 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1048261686, now seen corresponding path program 327 times [2021-04-15 02:34:28,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:28,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228266266] [2021-04-15 02:34:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:28,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228266266] [2021-04-15 02:34:28,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459728028] [2021-04-15 02:34:28,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:28,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:34:28,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:28,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:28,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:28,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:28,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206657087] [2021-04-15 02:34:28,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:28,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:28,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:28,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:28,351 INFO L87 Difference]: Start difference. First operand 52738 states and 176948 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:28,821 INFO L93 Difference]: Finished difference Result 57485 states and 191902 transitions. [2021-04-15 02:34:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:34:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:28,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:28,938 INFO L225 Difference]: With dead ends: 57485 [2021-04-15 02:34:28,938 INFO L226 Difference]: Without dead ends: 57485 [2021-04-15 02:34:28,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 292.9ms TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:34:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57485 states. [2021-04-15 02:34:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57485 to 55682. [2021-04-15 02:34:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55682 states, 55681 states have (on average 3.3543219410570932) internal successors, (186772), 55681 states have internal predecessors, (186772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55682 states to 55682 states and 186772 transitions. [2021-04-15 02:34:30,139 INFO L78 Accepts]: Start accepts. Automaton has 55682 states and 186772 transitions. Word has length 22 [2021-04-15 02:34:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:30,139 INFO L480 AbstractCegarLoop]: Abstraction has 55682 states and 186772 transitions. [2021-04-15 02:34:30,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 55682 states and 186772 transitions. [2021-04-15 02:34:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:30,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:30,150 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:30,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24745 [2021-04-15 02:34:30,350 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:30,351 INFO L82 PathProgramCache]: Analyzing trace with hash -348807655, now seen corresponding path program 328 times [2021-04-15 02:34:30,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:30,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433490142] [2021-04-15 02:34:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:30,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433490142] [2021-04-15 02:34:30,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119988731] [2021-04-15 02:34:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:30,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:30,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:30,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:30,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:30,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761194349] [2021-04-15 02:34:30,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:30,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:30,741 INFO L87 Difference]: Start difference. First operand 55682 states and 186772 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:31,193 INFO L93 Difference]: Finished difference Result 62863 states and 210498 transitions. [2021-04-15 02:34:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:34:31,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:31,327 INFO L225 Difference]: With dead ends: 62863 [2021-04-15 02:34:31,327 INFO L226 Difference]: Without dead ends: 62859 [2021-04-15 02:34:31,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:34:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62859 states. [2021-04-15 02:34:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62859 to 55742. [2021-04-15 02:34:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55742 states, 55741 states have (on average 3.3543531691214725) internal successors, (186975), 55741 states have internal predecessors, (186975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55742 states to 55742 states and 186975 transitions. [2021-04-15 02:34:32,526 INFO L78 Accepts]: Start accepts. Automaton has 55742 states and 186975 transitions. Word has length 22 [2021-04-15 02:34:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:32,526 INFO L480 AbstractCegarLoop]: Abstraction has 55742 states and 186975 transitions. [2021-04-15 02:34:32,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 55742 states and 186975 transitions. [2021-04-15 02:34:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:32,537 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:32,537 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:32,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24746 [2021-04-15 02:34:32,738 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash -510406108, now seen corresponding path program 329 times [2021-04-15 02:34:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:32,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368406027] [2021-04-15 02:34:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:32,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368406027] [2021-04-15 02:34:32,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387636022] [2021-04-15 02:34:32,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:32,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:34:32,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:32,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:32,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:32,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:32,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:32,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779699314] [2021-04-15 02:34:32,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:32,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:32,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:32,922 INFO L87 Difference]: Start difference. First operand 55742 states and 186975 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:33,414 INFO L93 Difference]: Finished difference Result 59840 states and 199447 transitions. [2021-04-15 02:34:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:34:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:33,544 INFO L225 Difference]: With dead ends: 59840 [2021-04-15 02:34:33,544 INFO L226 Difference]: Without dead ends: 59840 [2021-04-15 02:34:33,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=441, Invalid=965, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:34:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59840 states. [2021-04-15 02:34:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59840 to 57734. [2021-04-15 02:34:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57734 states, 57733 states have (on average 3.3485528207437687) internal successors, (193322), 57733 states have internal predecessors, (193322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57734 states to 57734 states and 193322 transitions. [2021-04-15 02:34:34,720 INFO L78 Accepts]: Start accepts. Automaton has 57734 states and 193322 transitions. Word has length 22 [2021-04-15 02:34:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:34,720 INFO L480 AbstractCegarLoop]: Abstraction has 57734 states and 193322 transitions. [2021-04-15 02:34:34,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57734 states and 193322 transitions. [2021-04-15 02:34:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:34,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:34,732 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:34,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24747 [2021-04-15 02:34:34,932 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash 745283933, now seen corresponding path program 330 times [2021-04-15 02:34:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:34,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766963617] [2021-04-15 02:34:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:35,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766963617] [2021-04-15 02:34:35,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414546165] [2021-04-15 02:34:35,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:35,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:35,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:35,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:35,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584947781] [2021-04-15 02:34:35,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:35,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:35,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:35,332 INFO L87 Difference]: Start difference. First operand 57734 states and 193322 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:35,771 INFO L93 Difference]: Finished difference Result 62862 states and 210023 transitions. [2021-04-15 02:34:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:35,902 INFO L225 Difference]: With dead ends: 62862 [2021-04-15 02:34:35,902 INFO L226 Difference]: Without dead ends: 62857 [2021-04-15 02:34:35,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:34:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62857 states. [2021-04-15 02:34:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62857 to 57784. [2021-04-15 02:34:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57784 states, 57783 states have (on average 3.3484761954207984) internal successors, (193485), 57783 states have internal predecessors, (193485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57784 states to 57784 states and 193485 transitions. [2021-04-15 02:34:37,174 INFO L78 Accepts]: Start accepts. Automaton has 57784 states and 193485 transitions. Word has length 22 [2021-04-15 02:34:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:37,174 INFO L480 AbstractCegarLoop]: Abstraction has 57784 states and 193485 transitions. [2021-04-15 02:34:37,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 57784 states and 193485 transitions. [2021-04-15 02:34:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:37,185 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:37,185 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:37,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24748,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:37,386 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:37,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1016752374, now seen corresponding path program 331 times [2021-04-15 02:34:37,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:37,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798094912] [2021-04-15 02:34:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:37,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798094912] [2021-04-15 02:34:37,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156249185] [2021-04-15 02:34:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:37,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:37,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:37,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135962833] [2021-04-15 02:34:37,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:37,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:37,566 INFO L87 Difference]: Start difference. First operand 57784 states and 193485 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:38,020 INFO L93 Difference]: Finished difference Result 59245 states and 197645 transitions. [2021-04-15 02:34:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:34:38,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:38,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:38,139 INFO L225 Difference]: With dead ends: 59245 [2021-04-15 02:34:38,139 INFO L226 Difference]: Without dead ends: 59245 [2021-04-15 02:34:38,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 02:34:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59245 states. [2021-04-15 02:34:39,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59245 to 58805. [2021-04-15 02:34:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58805 states, 58804 states have (on average 3.343939187810353) internal successors, (196637), 58804 states have internal predecessors, (196637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58805 states to 58805 states and 196637 transitions. [2021-04-15 02:34:39,560 INFO L78 Accepts]: Start accepts. Automaton has 58805 states and 196637 transitions. Word has length 22 [2021-04-15 02:34:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:39,560 INFO L480 AbstractCegarLoop]: Abstraction has 58805 states and 196637 transitions. [2021-04-15 02:34:39,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 58805 states and 196637 transitions. [2021-04-15 02:34:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:39,572 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:39,572 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:39,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24749 [2021-04-15 02:34:39,772 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 302384793, now seen corresponding path program 332 times [2021-04-15 02:34:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:39,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251106476] [2021-04-15 02:34:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:39,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251106476] [2021-04-15 02:34:39,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402859053] [2021-04-15 02:34:39,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:39,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:39,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:39,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:39,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:39,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:39,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463948548] [2021-04-15 02:34:39,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:39,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:39,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:39,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:39,938 INFO L87 Difference]: Start difference. First operand 58805 states and 196637 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:40,342 INFO L93 Difference]: Finished difference Result 61679 states and 205433 transitions. [2021-04-15 02:34:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:34:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:40,471 INFO L225 Difference]: With dead ends: 61679 [2021-04-15 02:34:40,472 INFO L226 Difference]: Without dead ends: 61673 [2021-04-15 02:34:40,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:34:40,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61673 states. [2021-04-15 02:34:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61673 to 58817. [2021-04-15 02:34:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58817 states, 58816 states have (on average 3.3438520130576714) internal successors, (196672), 58816 states have internal predecessors, (196672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58817 states to 58817 states and 196672 transitions. [2021-04-15 02:34:41,728 INFO L78 Accepts]: Start accepts. Automaton has 58817 states and 196672 transitions. Word has length 22 [2021-04-15 02:34:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:41,728 INFO L480 AbstractCegarLoop]: Abstraction has 58817 states and 196672 transitions. [2021-04-15 02:34:41,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58817 states and 196672 transitions. [2021-04-15 02:34:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:41,740 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:41,740 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:41,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24750,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:41,940 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 466382564, now seen corresponding path program 333 times [2021-04-15 02:34:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:41,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481029210] [2021-04-15 02:34:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481029210] [2021-04-15 02:34:42,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218067375] [2021-04-15 02:34:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:42,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:34:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:42,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:34:42,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:42,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-04-15 02:34:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973746671] [2021-04-15 02:34:42,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 02:34:42,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:42,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 02:34:42,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:34:42,125 INFO L87 Difference]: Start difference. First operand 58817 states and 196672 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:42,605 INFO L93 Difference]: Finished difference Result 59172 states and 197554 transitions. [2021-04-15 02:34:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:34:42,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:42,729 INFO L225 Difference]: With dead ends: 59172 [2021-04-15 02:34:42,729 INFO L226 Difference]: Without dead ends: 59172 [2021-04-15 02:34:42,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 02:34:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59172 states. [2021-04-15 02:34:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59172 to 58982. [2021-04-15 02:34:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58982 states, 58981 states have (on average 3.342923992472152) internal successors, (197169), 58981 states have internal predecessors, (197169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58982 states to 58982 states and 197169 transitions. [2021-04-15 02:34:44,147 INFO L78 Accepts]: Start accepts. Automaton has 58982 states and 197169 transitions. Word has length 22 [2021-04-15 02:34:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:44,148 INFO L480 AbstractCegarLoop]: Abstraction has 58982 states and 197169 transitions. [2021-04-15 02:34:44,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 58982 states and 197169 transitions. [2021-04-15 02:34:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:44,159 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:44,159 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:44,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24751 [2021-04-15 02:34:44,359 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:44,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:44,359 INFO L82 PathProgramCache]: Analyzing trace with hash -542586659, now seen corresponding path program 334 times [2021-04-15 02:34:44,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:44,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681967947] [2021-04-15 02:34:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:44,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681967947] [2021-04-15 02:34:44,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041305864] [2021-04-15 02:34:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:44,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:44,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:44,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:44,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:44,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695704622] [2021-04-15 02:34:44,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:44,543 INFO L87 Difference]: Start difference. First operand 58982 states and 197169 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:44,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:44,994 INFO L93 Difference]: Finished difference Result 61898 states and 206013 transitions. [2021-04-15 02:34:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:34:44,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:45,126 INFO L225 Difference]: With dead ends: 61898 [2021-04-15 02:34:45,126 INFO L226 Difference]: Without dead ends: 61891 [2021-04-15 02:34:45,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:45,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61891 states. [2021-04-15 02:34:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61891 to 59091. [2021-04-15 02:34:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59091 states, 59090 states have (on average 3.3429514300220005) internal successors, (197535), 59090 states have internal predecessors, (197535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59091 states to 59091 states and 197535 transitions. [2021-04-15 02:34:46,395 INFO L78 Accepts]: Start accepts. Automaton has 59091 states and 197535 transitions. Word has length 22 [2021-04-15 02:34:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:46,395 INFO L480 AbstractCegarLoop]: Abstraction has 59091 states and 197535 transitions. [2021-04-15 02:34:46,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 59091 states and 197535 transitions. [2021-04-15 02:34:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:46,407 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:46,407 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:46,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24752,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:46,607 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -801074614, now seen corresponding path program 335 times [2021-04-15 02:34:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:46,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680878220] [2021-04-15 02:34:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:46,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680878220] [2021-04-15 02:34:46,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147307204] [2021-04-15 02:34:46,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:46,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:34:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:46,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:46,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559854371] [2021-04-15 02:34:46,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:46,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:46,809 INFO L87 Difference]: Start difference. First operand 59091 states and 197535 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:47,595 INFO L93 Difference]: Finished difference Result 59327 states and 198014 transitions. [2021-04-15 02:34:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:34:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:47,701 INFO L225 Difference]: With dead ends: 59327 [2021-04-15 02:34:47,702 INFO L226 Difference]: Without dead ends: 59327 [2021-04-15 02:34:47,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=571, Invalid=1235, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:34:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59327 states. [2021-04-15 02:34:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59327 to 59074. [2021-04-15 02:34:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59074 states, 59073 states have (on average 3.3430501244223247) internal successors, (197484), 59073 states have internal predecessors, (197484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59074 states to 59074 states and 197484 transitions. [2021-04-15 02:34:48,835 INFO L78 Accepts]: Start accepts. Automaton has 59074 states and 197484 transitions. Word has length 22 [2021-04-15 02:34:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:48,835 INFO L480 AbstractCegarLoop]: Abstraction has 59074 states and 197484 transitions. [2021-04-15 02:34:48,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 59074 states and 197484 transitions. [2021-04-15 02:34:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:48,846 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:48,846 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:49,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24753 [2021-04-15 02:34:49,047 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash -966897895, now seen corresponding path program 336 times [2021-04-15 02:34:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:49,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429170619] [2021-04-15 02:34:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:49,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429170619] [2021-04-15 02:34:49,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185237317] [2021-04-15 02:34:49,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:49,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:34:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:49,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:49,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:49,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177226508] [2021-04-15 02:34:49,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:49,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:49,230 INFO L87 Difference]: Start difference. First operand 59074 states and 197484 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:49,616 INFO L93 Difference]: Finished difference Result 59702 states and 199136 transitions. [2021-04-15 02:34:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:34:49,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:49,736 INFO L225 Difference]: With dead ends: 59702 [2021-04-15 02:34:49,736 INFO L226 Difference]: Without dead ends: 59694 [2021-04-15 02:34:49,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59694 states. [2021-04-15 02:34:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59694 to 59074. [2021-04-15 02:34:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59074 states, 59073 states have (on average 3.343033196214853) internal successors, (197483), 59073 states have internal predecessors, (197483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59074 states to 59074 states and 197483 transitions. [2021-04-15 02:34:50,938 INFO L78 Accepts]: Start accepts. Automaton has 59074 states and 197483 transitions. Word has length 22 [2021-04-15 02:34:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:50,938 INFO L480 AbstractCegarLoop]: Abstraction has 59074 states and 197483 transitions. [2021-04-15 02:34:50,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 59074 states and 197483 transitions. [2021-04-15 02:34:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:50,950 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:50,950 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:51,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24754 [2021-04-15 02:34:51,151 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1437541468, now seen corresponding path program 337 times [2021-04-15 02:34:51,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:51,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54506172] [2021-04-15 02:34:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54506172] [2021-04-15 02:34:51,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383747380] [2021-04-15 02:34:51,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:51,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:51,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:51,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:51,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883315008] [2021-04-15 02:34:51,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:51,345 INFO L87 Difference]: Start difference. First operand 59074 states and 197483 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:52,113 INFO L93 Difference]: Finished difference Result 59388 states and 198191 transitions. [2021-04-15 02:34:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:34:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:52,247 INFO L225 Difference]: With dead ends: 59388 [2021-04-15 02:34:52,247 INFO L226 Difference]: Without dead ends: 59388 [2021-04-15 02:34:52,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=510, Invalid=1130, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 02:34:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59388 states. [2021-04-15 02:34:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59388 to 59083. [2021-04-15 02:34:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59083 states, 59082 states have (on average 3.3429809417419856) internal successors, (197510), 59082 states have internal predecessors, (197510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59083 states to 59083 states and 197510 transitions. [2021-04-15 02:34:53,445 INFO L78 Accepts]: Start accepts. Automaton has 59083 states and 197510 transitions. Word has length 22 [2021-04-15 02:34:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:53,445 INFO L480 AbstractCegarLoop]: Abstraction has 59083 states and 197510 transitions. [2021-04-15 02:34:53,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 59083 states and 197510 transitions. [2021-04-15 02:34:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:53,457 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:53,458 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:53,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24755 [2021-04-15 02:34:53,672 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1235644323, now seen corresponding path program 338 times [2021-04-15 02:34:53,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:53,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115072958] [2021-04-15 02:34:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:53,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115072958] [2021-04-15 02:34:53,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168912635] [2021-04-15 02:34:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:53,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:34:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:53,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:53,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:53,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814501041] [2021-04-15 02:34:53,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:53,887 INFO L87 Difference]: Start difference. First operand 59083 states and 197510 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:54,339 INFO L93 Difference]: Finished difference Result 59681 states and 199088 transitions. [2021-04-15 02:34:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:34:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:54,473 INFO L225 Difference]: With dead ends: 59681 [2021-04-15 02:34:54,473 INFO L226 Difference]: Without dead ends: 59672 [2021-04-15 02:34:54,473 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59672 states. [2021-04-15 02:34:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59672 to 59083. [2021-04-15 02:34:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59083 states, 59082 states have (on average 3.3429640161131986) internal successors, (197509), 59082 states have internal predecessors, (197509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59083 states to 59083 states and 197509 transitions. [2021-04-15 02:34:55,701 INFO L78 Accepts]: Start accepts. Automaton has 59083 states and 197509 transitions. Word has length 22 [2021-04-15 02:34:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:55,701 INFO L480 AbstractCegarLoop]: Abstraction has 59083 states and 197509 transitions. [2021-04-15 02:34:55,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59083 states and 197509 transitions. [2021-04-15 02:34:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:55,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:55,713 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:55,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24756 [2021-04-15 02:34:55,913 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:55,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:55,914 INFO L82 PathProgramCache]: Analyzing trace with hash 306822538, now seen corresponding path program 339 times [2021-04-15 02:34:55,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:55,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560105044] [2021-04-15 02:34:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:56,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560105044] [2021-04-15 02:34:56,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292737387] [2021-04-15 02:34:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:56,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:34:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:56,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:56,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:56,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:56,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:56,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663178374] [2021-04-15 02:34:56,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:56,111 INFO L87 Difference]: Start difference. First operand 59083 states and 197509 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:56,937 INFO L93 Difference]: Finished difference Result 59594 states and 198774 transitions. [2021-04-15 02:34:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:34:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:57,047 INFO L225 Difference]: With dead ends: 59594 [2021-04-15 02:34:57,047 INFO L226 Difference]: Without dead ends: 59594 [2021-04-15 02:34:57,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1356, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 02:34:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59594 states. [2021-04-15 02:34:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59594 to 59098. [2021-04-15 02:34:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59098 states, 59097 states have (on average 3.3428769649897627) internal successors, (197554), 59097 states have internal predecessors, (197554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59098 states to 59098 states and 197554 transitions. [2021-04-15 02:34:58,158 INFO L78 Accepts]: Start accepts. Automaton has 59098 states and 197554 transitions. Word has length 22 [2021-04-15 02:34:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:34:58,158 INFO L480 AbstractCegarLoop]: Abstraction has 59098 states and 197554 transitions. [2021-04-15 02:34:58,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 59098 states and 197554 transitions. [2021-04-15 02:34:58,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:34:58,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:34:58,168 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:34:58,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24757 [2021-04-15 02:34:58,369 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:34:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:34:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -976848999, now seen corresponding path program 340 times [2021-04-15 02:34:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:34:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220998853] [2021-04-15 02:34:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:34:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:34:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:58,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220998853] [2021-04-15 02:34:58,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139228272] [2021-04-15 02:34:58,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:34:58,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:34:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:34:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:34:58,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:34:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:34:58,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:34:58,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:34:58,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696100691] [2021-04-15 02:34:58,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:34:58,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:34:58,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:34:58,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:34:58,564 INFO L87 Difference]: Start difference. First operand 59098 states and 197554 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:34:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:34:58,939 INFO L93 Difference]: Finished difference Result 59666 states and 199057 transitions. [2021-04-15 02:34:58,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:34:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:34:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:34:59,056 INFO L225 Difference]: With dead ends: 59666 [2021-04-15 02:34:59,056 INFO L226 Difference]: Without dead ends: 59656 [2021-04-15 02:34:59,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:34:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59656 states. [2021-04-15 02:35:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59656 to 59098. [2021-04-15 02:35:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59098 states, 59097 states have (on average 3.3428600436570384) internal successors, (197553), 59097 states have internal predecessors, (197553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59098 states to 59098 states and 197553 transitions. [2021-04-15 02:35:00,234 INFO L78 Accepts]: Start accepts. Automaton has 59098 states and 197553 transitions. Word has length 22 [2021-04-15 02:35:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:00,234 INFO L480 AbstractCegarLoop]: Abstraction has 59098 states and 197553 transitions. [2021-04-15 02:35:00,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59098 states and 197553 transitions. [2021-04-15 02:35:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:00,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:00,247 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:00,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24758,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:00,447 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1452468124, now seen corresponding path program 341 times [2021-04-15 02:35:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:00,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941505439] [2021-04-15 02:35:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941505439] [2021-04-15 02:35:00,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099926296] [2021-04-15 02:35:00,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:00,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:35:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:35:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:00,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:00,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-04-15 02:35:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7692800] [2021-04-15 02:35:00,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 02:35:00,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 02:35:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:35:00,647 INFO L87 Difference]: Start difference. First operand 59098 states and 197553 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:01,506 INFO L93 Difference]: Finished difference Result 59688 states and 199051 transitions. [2021-04-15 02:35:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 02:35:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:01,634 INFO L225 Difference]: With dead ends: 59688 [2021-04-15 02:35:01,635 INFO L226 Difference]: Without dead ends: 59688 [2021-04-15 02:35:01,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=590, Invalid=1302, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 02:35:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59688 states. [2021-04-15 02:35:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59688 to 59110. [2021-04-15 02:35:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59110 states, 59109 states have (on average 3.3427904380043647) internal successors, (197589), 59109 states have internal predecessors, (197589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59110 states to 59110 states and 197589 transitions. [2021-04-15 02:35:02,850 INFO L78 Accepts]: Start accepts. Automaton has 59110 states and 197589 transitions. Word has length 22 [2021-04-15 02:35:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:02,850 INFO L480 AbstractCegarLoop]: Abstraction has 59110 states and 197589 transitions. [2021-04-15 02:35:02,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 59110 states and 197589 transitions. [2021-04-15 02:35:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:02,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:02,862 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:03,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24759,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:03,063 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1544128547, now seen corresponding path program 342 times [2021-04-15 02:35:03,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:03,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482312604] [2021-04-15 02:35:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482312604] [2021-04-15 02:35:03,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81756443] [2021-04-15 02:35:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:03,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:35:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:35:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 66 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:03,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:03,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-04-15 02:35:03,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859555950] [2021-04-15 02:35:03,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:35:03,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:03,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:35:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:35:03,279 INFO L87 Difference]: Start difference. First operand 59110 states and 197589 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:03,719 INFO L93 Difference]: Finished difference Result 59635 states and 199005 transitions. [2021-04-15 02:35:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:35:03,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:03,861 INFO L225 Difference]: With dead ends: 59635 [2021-04-15 02:35:03,862 INFO L226 Difference]: Without dead ends: 59624 [2021-04-15 02:35:03,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:35:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59624 states. [2021-04-15 02:35:04,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59624 to 59109. [2021-04-15 02:35:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59109 states, 59108 states have (on average 3.342813155579617) internal successors, (197587), 59108 states have internal predecessors, (197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59109 states to 59109 states and 197587 transitions. [2021-04-15 02:35:05,165 INFO L78 Accepts]: Start accepts. Automaton has 59109 states and 197587 transitions. Word has length 22 [2021-04-15 02:35:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:05,165 INFO L480 AbstractCegarLoop]: Abstraction has 59109 states and 197587 transitions. [2021-04-15 02:35:05,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:05,165 INFO L276 IsEmpty]: Start isEmpty. Operand 59109 states and 197587 transitions. [2021-04-15 02:35:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:35:05,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:05,178 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:05,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24760,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:05,378 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash -155903798, now seen corresponding path program 343 times [2021-04-15 02:35:05,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:05,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384363956] [2021-04-15 02:35:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:05,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384363956] [2021-04-15 02:35:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313610135] [2021-04-15 02:35:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:05,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:35:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:05,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:05,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-04-15 02:35:05,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925092474] [2021-04-15 02:35:05,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 02:35:05,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 02:35:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:35:05,606 INFO L87 Difference]: Start difference. First operand 59109 states and 197587 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:06,534 INFO L93 Difference]: Finished difference Result 60371 states and 201009 transitions. [2021-04-15 02:35:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 02:35:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 02:35:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:06,666 INFO L225 Difference]: With dead ends: 60371 [2021-04-15 02:35:06,666 INFO L226 Difference]: Without dead ends: 60371 [2021-04-15 02:35:06,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 02:35:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-04-15 02:35:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59170. [2021-04-15 02:35:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59170 states, 59169 states have (on average 3.3423921310145515) internal successors, (197766), 59169 states have internal predecessors, (197766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59170 states to 59170 states and 197766 transitions. [2021-04-15 02:35:07,877 INFO L78 Accepts]: Start accepts. Automaton has 59170 states and 197766 transitions. Word has length 22 [2021-04-15 02:35:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:07,877 INFO L480 AbstractCegarLoop]: Abstraction has 59170 states and 197766 transitions. [2021-04-15 02:35:07,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 59170 states and 197766 transitions. [2021-04-15 02:35:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:35:07,890 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:07,890 INFO L551 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:08,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24761 [2021-04-15 02:35:08,091 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1494166738, now seen corresponding path program 344 times [2021-04-15 02:35:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939347375] [2021-04-15 02:35:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939347375] [2021-04-15 02:35:08,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292680594] [2021-04-15 02:35:08,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:08,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:35:08,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:08,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:35:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:08,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:08,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 02:35:08,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448795806] [2021-04-15 02:35:08,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:35:08,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:35:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:08,450 INFO L87 Difference]: Start difference. First operand 59170 states and 197766 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) [2021-04-15 02:35:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:08,895 INFO L93 Difference]: Finished difference Result 65718 states and 216988 transitions. [2021-04-15 02:35:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:35:08,896 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 [2021-04-15 02:35:08,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:09,026 INFO L225 Difference]: With dead ends: 65718 [2021-04-15 02:35:09,027 INFO L226 Difference]: Without dead ends: 65718 [2021-04-15 02:35:09,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:35:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65718 states. [2021-04-15 02:35:10,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65718 to 59682. [2021-04-15 02:35:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59682 states, 59681 states have (on average 3.335332853001793) internal successors, (199056), 59681 states have internal predecessors, (199056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59682 states to 59682 states and 199056 transitions. [2021-04-15 02:35:10,321 INFO L78 Accepts]: Start accepts. Automaton has 59682 states and 199056 transitions. Word has length 23 [2021-04-15 02:35:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:10,321 INFO L480 AbstractCegarLoop]: Abstraction has 59682 states and 199056 transitions. [2021-04-15 02:35:10,321 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) [2021-04-15 02:35:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 59682 states and 199056 transitions. [2021-04-15 02:35:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:35:10,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:10,337 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:10,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24762 [2021-04-15 02:35:10,537 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:10,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1014106332, now seen corresponding path program 345 times [2021-04-15 02:35:10,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:10,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612675668] [2021-04-15 02:35:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:10,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612675668] [2021-04-15 02:35:10,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953175578] [2021-04-15 02:35:10,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:10,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:35:10,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 02:35:10,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:11,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:11,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2021-04-15 02:35:11,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154005995] [2021-04-15 02:35:11,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 02:35:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:11,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 02:35:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:35:11,415 INFO L87 Difference]: Start difference. First operand 59682 states and 199056 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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) [2021-04-15 02:35:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:12,257 INFO L93 Difference]: Finished difference Result 68619 states and 225518 transitions. [2021-04-15 02:35:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:35:12,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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 [2021-04-15 02:35:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:12,409 INFO L225 Difference]: With dead ends: 68619 [2021-04-15 02:35:12,409 INFO L226 Difference]: Without dead ends: 68619 [2021-04-15 02:35:12,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1045.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1549, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 02:35:12,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2021-04-15 02:35:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 60402. [2021-04-15 02:35:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60402 states, 60401 states have (on average 3.3286369430969684) internal successors, (201053), 60401 states have internal predecessors, (201053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60402 states to 60402 states and 201053 transitions. [2021-04-15 02:35:13,691 INFO L78 Accepts]: Start accepts. Automaton has 60402 states and 201053 transitions. Word has length 24 [2021-04-15 02:35:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:13,691 INFO L480 AbstractCegarLoop]: Abstraction has 60402 states and 201053 transitions. [2021-04-15 02:35:13,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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) [2021-04-15 02:35:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 60402 states and 201053 transitions. [2021-04-15 02:35:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 02:35:13,712 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:13,712 INFO L551 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:13,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24763 [2021-04-15 02:35:13,912 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1461160174, now seen corresponding path program 346 times [2021-04-15 02:35:13,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:13,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147715277] [2021-04-15 02:35:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:14,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147715277] [2021-04-15 02:35:14,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441989990] [2021-04-15 02:35:14,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:14,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:35:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:14,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:14,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-04-15 02:35:14,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121505327] [2021-04-15 02:35:14,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 02:35:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 02:35:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:14,403 INFO L87 Difference]: Start difference. First operand 60402 states and 201053 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:15,055 INFO L93 Difference]: Finished difference Result 72380 states and 236642 transitions. [2021-04-15 02:35:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:35:15,056 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 02:35:15,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:15,196 INFO L225 Difference]: With dead ends: 72380 [2021-04-15 02:35:15,196 INFO L226 Difference]: Without dead ends: 72380 [2021-04-15 02:35:15,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:35:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72380 states. [2021-04-15 02:35:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72380 to 61410. [2021-04-15 02:35:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61410 states, 61409 states have (on average 3.3206858929472878) internal successors, (203920), 61409 states have internal predecessors, (203920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61410 states to 61410 states and 203920 transitions. [2021-04-15 02:35:16,429 INFO L78 Accepts]: Start accepts. Automaton has 61410 states and 203920 transitions. Word has length 25 [2021-04-15 02:35:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:16,429 INFO L480 AbstractCegarLoop]: Abstraction has 61410 states and 203920 transitions. [2021-04-15 02:35:16,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61410 states and 203920 transitions. [2021-04-15 02:35:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 02:35:16,452 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:16,452 INFO L551 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:16,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24764 [2021-04-15 02:35:16,652 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1860039908, now seen corresponding path program 347 times [2021-04-15 02:35:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:16,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918612043] [2021-04-15 02:35:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:16,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918612043] [2021-04-15 02:35:16,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824113600] [2021-04-15 02:35:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:16,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 02:35:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 02:35:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:35:17,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:17,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-04-15 02:35:17,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105880602] [2021-04-15 02:35:17,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:35:17,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:35:17,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:17,188 INFO L87 Difference]: Start difference. First operand 61410 states and 203920 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:17,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:17,701 INFO L93 Difference]: Finished difference Result 77095 states and 250630 transitions. [2021-04-15 02:35:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:35:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 02:35:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:17,842 INFO L225 Difference]: With dead ends: 77095 [2021-04-15 02:35:17,842 INFO L226 Difference]: Without dead ends: 77089 [2021-04-15 02:35:17,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77089 states. [2021-04-15 02:35:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77089 to 62989. [2021-04-15 02:35:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62989 states, 62988 states have (on average 3.301374865053661) internal successors, (207947), 62988 states have internal predecessors, (207947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62989 states to 62989 states and 207947 transitions. [2021-04-15 02:35:19,327 INFO L78 Accepts]: Start accepts. Automaton has 62989 states and 207947 transitions. Word has length 26 [2021-04-15 02:35:19,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:19,327 INFO L480 AbstractCegarLoop]: Abstraction has 62989 states and 207947 transitions. [2021-04-15 02:35:19,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 62989 states and 207947 transitions. [2021-04-15 02:35:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 02:35:19,361 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:19,361 INFO L551 BasicCegarLoop]: trace histogram [15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:19,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24765 [2021-04-15 02:35:19,568 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:19,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1738027346, now seen corresponding path program 348 times [2021-04-15 02:35:19,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:19,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638086206] [2021-04-15 02:35:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:19,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638086206] [2021-04-15 02:35:19,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407744523] [2021-04-15 02:35:19,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:35:19,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-15 02:35:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 02:35:19,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:20,963 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification that was a NOOP. DAG size: 451 [2021-04-15 02:35:20,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 29 new quantified variables, introduced 105 case distinctions, treesize of input 67 treesize of output 889 [2021-04-15 02:35:25,073 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 2064 DAG size of output: 1711 [2021-04-15 02:35:25,278 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 3524 DAG size of output: 2916 [2021-04-15 02:35:29,135 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1646 [2021-04-15 02:35:29,334 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 3409 DAG size of output: 2802 [2021-04-15 02:35:29,773 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 6727 DAG size of output: 5044 [2021-04-15 02:35:30,217 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 6756 DAG size of output: 5072 [2021-04-15 02:35:30,719 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 6783 DAG size of output: 5098 [2021-04-15 02:35:32,831 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1979 DAG size of output: 1628 [2021-04-15 02:35:32,949 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 2011 DAG size of output: 1659 [2021-04-15 02:35:34,941 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2815 [2021-04-15 02:35:36,715 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1385 [2021-04-15 02:35:38,948 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 2049 DAG size of output: 1697 [2021-04-15 02:35:39,072 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 2080 DAG size of output: 1727 [2021-04-15 02:35:39,292 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 3540 DAG size of output: 2932 [2021-04-15 02:35:39,735 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 6743 DAG size of output: 5048 [2021-04-15 02:35:40,245 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 6774 DAG size of output: 5078 [2021-04-15 02:35:40,742 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 6803 DAG size of output: 5106 [2021-04-15 02:35:41,794 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 13307 DAG size of output: 9920 [2021-04-15 02:35:42,829 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 13339 DAG size of output: 9923 [2021-04-15 02:35:43,993 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 13366 DAG size of output: 9950 [2021-04-15 02:35:46,030 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1116 DAG size of output: 1001 [2021-04-15 02:35:46,248 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 2064 DAG size of output: 1711 [2021-04-15 02:35:48,129 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 3524 DAG size of output: 2916 [2021-04-15 02:35:48,353 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 3567 DAG size of output: 2958 [2021-04-15 02:35:48,589 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 3596 DAG size of output: 2986 [2021-04-15 02:35:50,783 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1968 DAG size of output: 1617 [2021-04-15 02:35:50,939 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1646 [2021-04-15 02:35:52,968 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1594 DAG size of output: 1338 [2021-04-15 02:35:53,334 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 3409 DAG size of output: 2802 [2021-04-15 02:35:53,546 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 3452 DAG size of output: 2844 [2021-04-15 02:35:53,769 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 3482 DAG size of output: 2873 [2021-04-15 02:35:54,229 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 6806 DAG size of output: 5111 [2021-04-15 02:35:54,722 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 6834 DAG size of output: 5138 [2021-04-15 02:35:58,252 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 2054 DAG size of output: 1700 [2021-04-15 02:35:58,453 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 3520 DAG size of output: 2911 [2021-04-15 02:35:58,668 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 3561 DAG size of output: 2951 [2021-04-15 02:35:59,028 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 3588 DAG size of output: 2977 [2021-04-15 02:36:02,594 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 3395 DAG size of output: 2788 [2021-04-15 02:36:02,797 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 3436 DAG size of output: 2828 [2021-04-15 02:36:03,011 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 3464 DAG size of output: 2855 [2021-04-15 02:36:03,453 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 6798 DAG size of output: 5104 [2021-04-15 02:36:03,927 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 6824 DAG size of output: 5129 [2021-04-15 02:36:05,019 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 13359 DAG size of output: 9964 [2021-04-15 02:36:06,042 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 13391 DAG size of output: 9992 [2021-04-15 02:36:07,107 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 13417 DAG size of output: 10018 [2021-04-15 02:36:09,388 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 26435 DAG size of output: 19636 [2021-04-15 02:36:11,600 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 26435 DAG size of output: 19636 [2021-04-15 02:36:14,231 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 26460 DAG size of output: 19661 [2021-04-15 02:36:18,290 WARN L205 SmtUtils]: Spent 3.92 s on a formula simplification. DAG size of input: 19663 DAG size of output: 24744 [2021-04-15 02:36:22,476 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 17088 DAG size of output: 20435 [2021-04-15 02:36:26,612 WARN L205 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 17069 DAG size of output: 20765 [2021-04-15 02:36:30,029 WARN L205 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 13416 DAG size of output: 16282 [2021-04-15 02:36:32,343 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 11525 DAG size of output: 14365 [2021-04-15 02:36:33,730 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 5320 DAG size of output: 7030 [2021-04-15 02:36:34,332 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 5049 DAG size of output: 5049 [2021-04-15 02:36:34,626 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 2654 [2021-04-15 02:36:36,474 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 2626 DAG size of output: 4152 [2021-04-15 02:36:37,025 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 2619 DAG size of output: 3353 [2021-04-15 02:36:37,572 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 2288 DAG size of output: 2623 [2021-04-15 02:36:38,236 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 2285 DAG size of output: 3024 [2021-04-15 02:36:38,510 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2281 DAG size of output: 2281 [2021-04-15 02:36:38,763 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1263 DAG size of output: 1583 [2021-04-15 02:36:39,022 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1580 [2021-04-15 02:36:39,255 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 1242 [2021-04-15 02:36:39,370 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 980 [2021-04-15 02:36:39,535 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 985 [2021-04-15 02:36:42,859 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1073 DAG size of output: 962 [2021-04-15 02:36:43,027 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1152 [2021-04-15 02:36:43,235 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 1176 [2021-04-15 02:36:43,452 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 1745 DAG size of output: 1414 [2021-04-15 02:36:43,871 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 2389 DAG size of output: 1770 [2021-04-15 02:36:44,245 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 2447 DAG size of output: 1817 [2021-04-15 02:36:44,628 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 3030 DAG size of output: 2003 [2021-04-15 02:36:44,831 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1173 DAG size of output: 1204 [2021-04-15 02:36:44,948 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 658 DAG size of output: 750 [2021-04-15 02:36:47,821 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 981 [2021-04-15 02:36:48,922 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1551 DAG size of output: 1281 [2021-04-15 02:36:49,139 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1578 DAG size of output: 1306 [2021-04-15 02:36:49,447 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 1639 DAG size of output: 1363 [2021-04-15 02:36:49,681 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1603 [2021-04-15 02:36:50,013 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 2764 DAG size of output: 1940 [2021-04-15 02:36:50,746 WARN L205 SmtUtils]: Spent 719.00 ms on a formula simplification. DAG size of input: 4612 DAG size of output: 3006 [2021-04-15 02:36:50,997 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1155 DAG size of output: 1530 [2021-04-15 02:36:51,117 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1126 DAG size of output: 1126 [2021-04-15 02:36:51,288 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1104 DAG size of output: 1132 [2021-04-15 02:36:54,726 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 1005 [2021-04-15 02:36:54,962 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1123 DAG size of output: 1043 [2021-04-15 02:36:55,126 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1447 DAG size of output: 1290 [2021-04-15 02:36:55,307 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1473 DAG size of output: 1287 [2021-04-15 02:36:55,524 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1831 DAG size of output: 1543 [2021-04-15 02:36:55,836 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2543 DAG size of output: 1920 [2021-04-15 02:36:56,212 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 2599 DAG size of output: 1967 [2021-04-15 02:36:56,442 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 1335 [2021-04-15 02:36:56,613 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1034 DAG size of output: 1065 [2021-04-15 02:37:00,124 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 1089 [2021-04-15 02:37:00,291 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1531 DAG size of output: 1327 [2021-04-15 02:37:00,621 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1320 [2021-04-15 02:37:00,837 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1918 DAG size of output: 1574 [2021-04-15 02:37:01,103 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 1981 DAG size of output: 1627 [2021-04-15 02:37:01,421 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 2604 DAG size of output: 2003 [2021-04-15 02:37:01,801 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 3191 DAG size of output: 2189 [2021-04-15 02:37:02,518 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 4231 DAG size of output: 3003 [2021-04-15 02:37:03,982 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 6650 DAG size of output: 4395 [2021-04-15 02:37:04,255 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 1256 DAG size of output: 1571 [2021-04-15 02:37:04,375 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 1145 [2021-04-15 02:37:04,570 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1118 DAG size of output: 1118 [2021-04-15 02:37:05,057 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 172 [2021-04-15 02:37:08,901 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1596 DAG size of output: 1359 [2021-04-15 02:37:09,081 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1639 DAG size of output: 1407 [2021-04-15 02:37:09,333 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 2134 DAG size of output: 1765 [2021-04-15 02:37:09,615 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 2362 DAG size of output: 1855 [2021-04-15 02:37:11,050 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 240 [2021-04-15 02:37:12,850 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 1280 [2021-04-15 02:37:13,034 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1563 DAG size of output: 1328 [2021-04-15 02:37:14,322 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2007 DAG size of output: 1666 [2021-04-15 02:37:14,877 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 3035 DAG size of output: 2397 [2021-04-15 02:37:15,504 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 3474 DAG size of output: 2570 [2021-04-15 02:37:16,286 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 3551 DAG size of output: 2597 [2021-04-15 02:37:16,424 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1205 DAG size of output: 1205 [2021-04-15 02:37:16,667 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 1540 [2021-04-15 02:37:16,781 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 950 [2021-04-15 02:37:20,854 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1383 DAG size of output: 1259 [2021-04-15 02:37:21,035 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 1305 [2021-04-15 02:37:21,222 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1620 DAG size of output: 1420 [2021-04-15 02:37:21,484 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 1984 DAG size of output: 1743 [2021-04-15 02:37:21,875 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 2218 DAG size of output: 1838 [2021-04-15 02:37:22,232 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 2579 DAG size of output: 2025 [2021-04-15 02:37:22,360 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 1139 [2021-04-15 02:37:27,369 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 921 [2021-04-15 02:37:27,543 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1027 DAG size of output: 966 [2021-04-15 02:37:27,848 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 1278 DAG size of output: 1095 [2021-04-15 02:37:28,147 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 1495 [2021-04-15 02:37:28,510 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 2167 DAG size of output: 1706 [2021-04-15 02:37:29,239 WARN L205 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 3929 DAG size of output: 3032 [2021-04-15 02:37:30,105 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 4003 DAG size of output: 3037 [2021-04-15 02:37:31,546 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 5919 DAG size of output: 4268 [2021-04-15 02:37:34,952 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 12069 DAG size of output: 8243 [2021-04-15 02:37:38,365 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 13604 DAG size of output: 8752 [2021-04-15 02:37:42,117 WARN L205 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 15197 DAG size of output: 9796 [2021-04-15 02:37:42,656 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 2256 DAG size of output: 2570 [2021-04-15 02:37:43,161 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 2253 DAG size of output: 2992 [2021-04-15 02:37:43,410 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2249 DAG size of output: 2249 [2021-04-15 02:37:43,527 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 1233 [2021-04-15 02:37:43,638 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1206 [2021-04-15 02:37:46,745 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1026 DAG size of output: 869 [2021-04-15 02:37:46,893 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1644 DAG size of output: 1372 [2021-04-15 02:37:47,069 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1414 [2021-04-15 02:37:47,251 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 2029 DAG size of output: 1598 [2021-04-15 02:37:47,461 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 2236 DAG size of output: 1731 [2021-04-15 02:37:47,695 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2429 DAG size of output: 1792 [2021-04-15 02:37:49,428 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 2888 DAG size of output: 2039 [2021-04-15 02:37:52,573 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 1118 DAG size of output: 1079 [2021-04-15 02:37:52,707 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1144 DAG size of output: 1117 [2021-04-15 02:37:52,867 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1491 DAG size of output: 1307 [2021-04-15 02:37:54,035 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1869 DAG size of output: 1590 [2021-04-15 02:37:54,289 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2308 DAG size of output: 1835 [2021-04-15 02:37:54,591 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2578 DAG size of output: 2031 [2021-04-15 02:37:55,240 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 4251 DAG size of output: 3039 [2021-04-15 02:37:59,383 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1181 DAG size of output: 1146 [2021-04-15 02:37:59,529 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1533 DAG size of output: 1328 [2021-04-15 02:37:59,699 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1891 DAG size of output: 1520 [2021-04-15 02:37:59,899 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 2088 DAG size of output: 1657 [2021-04-15 02:38:00,112 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 2123 DAG size of output: 1703 [2021-04-15 02:38:00,410 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 2663 DAG size of output: 2139 [2021-04-15 02:38:03,409 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1546 DAG size of output: 1362 [2021-04-15 02:38:03,571 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1404 [2021-04-15 02:38:03,851 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 1938 DAG size of output: 1596 [2021-04-15 02:38:04,057 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2137 DAG size of output: 1735 [2021-04-15 02:38:05,430 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 2730 DAG size of output: 2177 [2021-04-15 02:38:05,758 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2964 DAG size of output: 2245 [2021-04-15 02:38:06,397 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 3832 DAG size of output: 3023 [2021-04-15 02:38:07,694 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 6315 DAG size of output: 4784 [2021-04-15 02:38:09,175 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 6650 DAG size of output: 4781 [2021-04-15 02:38:10,860 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 6795 DAG size of output: 4899 [2021-04-15 02:38:11,424 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1497 [2021-04-15 02:38:11,539 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1240 DAG size of output: 1240 [2021-04-15 02:38:11,647 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1215 [2021-04-15 02:38:15,360 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 1239 [2021-04-15 02:38:15,519 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1635 DAG size of output: 1410 [2021-04-15 02:38:15,716 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1656 [2021-04-15 02:38:15,942 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 2535 DAG size of output: 1909 [2021-04-15 02:38:16,208 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2798 DAG size of output: 2114 [2021-04-15 02:38:19,850 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 567 DAG size of output: 530 [2021-04-15 02:38:20,149 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1700 DAG size of output: 1417 [2021-04-15 02:38:20,297 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1730 DAG size of output: 1454 [2021-04-15 02:38:20,501 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2127 DAG size of output: 1710 [2021-04-15 02:38:20,740 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 2585 DAG size of output: 1961 [2021-04-15 02:38:21,017 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2848 DAG size of output: 2166 [2021-04-15 02:38:21,319 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 3098 DAG size of output: 2231 [2021-04-15 02:38:21,902 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 3981 DAG size of output: 3005 [2021-04-15 02:38:22,556 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 4332 DAG size of output: 3179 [2021-04-15 02:38:23,350 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 4423 DAG size of output: 3242 [2021-04-15 02:38:24,228 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 4548 DAG size of output: 3344 [2021-04-15 02:38:24,576 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1309 [2021-04-15 02:38:24,697 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1178 DAG size of output: 1178 [2021-04-15 02:38:24,877 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 1153 [2021-04-15 02:38:24,985 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1128 DAG size of output: 1128 [2021-04-15 02:38:27,199 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 889 DAG size of output: 907 [2021-04-15 02:38:29,065 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 802 [2021-04-15 02:38:29,301 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1435 DAG size of output: 1305 [2021-04-15 02:38:29,551 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1465 DAG size of output: 1342 [2021-04-15 02:38:31,266 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 1882 DAG size of output: 1698 [2021-04-15 02:38:31,667 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 2245 DAG size of output: 1887 [2021-04-15 02:38:32,132 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 2287 DAG size of output: 1925 [2021-04-15 02:38:32,578 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 2349 DAG size of output: 1980 [2021-04-15 02:38:32,701 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 1202 [2021-04-15 02:38:32,888 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1177 [2021-04-15 02:38:33,144 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1154 DAG size of output: 1415 [2021-04-15 02:38:36,688 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 1095 [2021-04-15 02:38:36,826 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1282 DAG size of output: 1105 [2021-04-15 02:38:36,994 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1556 DAG size of output: 1253 [2021-04-15 02:38:37,194 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1976 DAG size of output: 1490 [2021-04-15 02:38:37,424 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 2411 DAG size of output: 1725 [2021-04-15 02:38:37,697 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2683 DAG size of output: 1915 [2021-04-15 02:38:38,023 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 3054 DAG size of output: 2126 [2021-04-15 02:38:38,404 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 3632 DAG size of output: 2324 [2021-04-15 02:38:38,807 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 3690 DAG size of output: 2348 [2021-04-15 02:38:39,232 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 3767 DAG size of output: 2425 [2021-04-15 02:38:40,131 WARN L205 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 5097 DAG size of output: 3714 [2021-04-15 02:38:41,860 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 7308 DAG size of output: 5515 [2021-04-15 02:38:45,245 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 13244 DAG size of output: 9664 [2021-04-15 02:38:48,806 WARN L205 SmtUtils]: Spent 3.49 s on a formula simplification. DAG size of input: 14517 DAG size of output: 10052 [2021-04-15 02:38:52,782 WARN L205 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 15764 DAG size of output: 11290 [2021-04-15 02:39:00,661 WARN L205 SmtUtils]: Spent 7.79 s on a formula simplification. DAG size of input: 25284 DAG size of output: 17457 [2021-04-15 02:39:00,988 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2416 DAG size of output: 2416 [2021-04-15 02:39:01,224 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1338 DAG size of output: 1613 [2021-04-15 02:39:01,449 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1255 DAG size of output: 1418 [2021-04-15 02:39:01,562 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1250 DAG size of output: 1250 [2021-04-15 02:39:02,166 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1227 DAG size of output: 1592 [2021-04-15 02:39:02,377 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1224 DAG size of output: 1474 [2021-04-15 02:39:02,590 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 1475 [2021-04-15 02:39:03,353 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 586 [2021-04-15 02:39:06,573 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1274 DAG size of output: 1224 [2021-04-15 02:39:06,743 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1535 DAG size of output: 1366 [2021-04-15 02:39:06,949 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1933 DAG size of output: 1612 [2021-04-15 02:39:07,197 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 2130 DAG size of output: 1807 [2021-04-15 02:39:07,480 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2545 DAG size of output: 2049 [2021-04-15 02:39:07,801 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 2811 DAG size of output: 2232 [2021-04-15 02:39:08,180 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 3175 DAG size of output: 2425 [2021-04-15 02:39:08,629 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 3232 DAG size of output: 2463 [2021-04-15 02:39:08,945 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 1183 DAG size of output: 1446 [2021-04-15 02:39:09,101 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1180 DAG size of output: 1208 [2021-04-15 02:39:12,482 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 1046 [2021-04-15 02:39:12,606 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 1142 [2021-04-15 02:39:12,750 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1614 DAG size of output: 1325 [2021-04-15 02:39:12,925 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1460 [2021-04-15 02:39:13,159 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2260 DAG size of output: 1712 [2021-04-15 02:39:13,431 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 2675 DAG size of output: 1952 [2021-04-15 02:39:13,766 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 2719 DAG size of output: 1989 [2021-04-15 02:39:14,146 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 3361 DAG size of output: 2365 [2021-04-15 02:39:14,675 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 3905 DAG size of output: 2535 [2021-04-15 02:39:15,527 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 5044 DAG size of output: 3631 [2021-04-15 02:39:15,744 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1221 DAG size of output: 1552 [2021-04-15 02:39:15,937 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1219 DAG size of output: 1515 [2021-04-15 02:39:16,084 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1244 [2021-04-15 02:39:19,338 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1293 DAG size of output: 1157 [2021-04-15 02:39:19,456 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1348 DAG size of output: 1197 [2021-04-15 02:39:19,594 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1678 DAG size of output: 1381 [2021-04-15 02:39:19,788 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2140 DAG size of output: 1603 [2021-04-15 02:39:20,102 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 2168 DAG size of output: 1605 [2021-04-15 02:39:20,359 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 2404 DAG size of output: 1794 [2021-04-15 02:39:20,652 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 2051 [2021-04-15 02:39:21,025 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 3458 DAG size of output: 2455 [2021-04-15 02:39:21,455 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 4000 DAG size of output: 2623 [2021-04-15 02:39:23,406 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1106 DAG size of output: 1050 [2021-04-15 02:39:25,135 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1445 DAG size of output: 1238 [2021-04-15 02:39:25,448 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2212 DAG size of output: 1821 [2021-04-15 02:39:25,793 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 2279 DAG size of output: 1866 [2021-04-15 02:39:27,452 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 2925 DAG size of output: 2312 [2021-04-15 02:39:27,858 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 3279 DAG size of output: 2505 [2021-04-15 02:39:28,328 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 3329 DAG size of output: 2537 [2021-04-15 02:39:29,210 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 5388 DAG size of output: 3872 [2021-04-15 02:39:31,070 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 7761 DAG size of output: 5550 [2021-04-15 02:39:32,956 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 8346 DAG size of output: 5731 [2021-04-15 02:39:35,019 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 8630 DAG size of output: 5991 [2021-04-15 02:39:37,165 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 9221 DAG size of output: 6662 [2021-04-15 02:39:37,427 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1169 DAG size of output: 1332 [2021-04-15 02:39:37,544 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1164 DAG size of output: 1164 [2021-04-15 02:39:38,104 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 1507 [2021-04-15 02:39:38,322 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 1418 [2021-04-15 02:39:38,432 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1082 [2021-04-15 02:39:40,440 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1297 DAG size of output: 1183 [2021-04-15 02:39:42,149 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1102 DAG size of output: 989 [2021-04-15 02:39:42,381 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1826 DAG size of output: 1579 [2021-04-15 02:39:45,939 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 627 DAG size of output: 637 [2021-04-15 02:39:46,098 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 1036 [2021-04-15 02:39:46,352 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 1423 DAG size of output: 1356 [2021-04-15 02:39:46,828 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 2208 [2021-04-15 02:39:47,501 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 2691 DAG size of output: 2294 [2021-04-15 02:39:49,005 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 634 [2021-04-15 02:39:50,555 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 967 DAG size of output: 1007 [2021-04-15 02:39:50,788 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1081 DAG size of output: 1105 [2021-04-15 02:39:51,631 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 3200 DAG size of output: 2863 [2021-04-15 02:39:52,461 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 3606 DAG size of output: 3075 [2021-04-15 02:39:53,340 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 3684 DAG size of output: 3122 [2021-04-15 02:39:53,561 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1080 DAG size of output: 1438 [2021-04-15 02:39:53,761 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1015 DAG size of output: 1311 [2021-04-15 02:39:54,043 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 1012 [2021-04-15 02:39:56,649 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1444 DAG size of output: 1377 [2021-04-15 02:39:56,807 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1496 DAG size of output: 1419 [2021-04-15 02:39:58,086 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 1786 [2021-04-15 02:39:58,408 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 2644 DAG size of output: 2159 [2021-04-15 02:39:58,752 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 2689 DAG size of output: 2197 [2021-04-15 02:39:59,148 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 3231 DAG size of output: 2377 [2021-04-15 02:40:02,493 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1436 DAG size of output: 1313 [2021-04-15 02:40:02,691 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1631 DAG size of output: 1431 [2021-04-15 02:40:02,904 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1691 DAG size of output: 1478 [2021-04-15 02:40:04,633 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 2206 DAG size of output: 1917 [2021-04-15 02:40:05,018 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 2607 DAG size of output: 2115 [2021-04-15 02:40:05,462 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 2650 DAG size of output: 2139 [2021-04-15 02:40:06,286 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 4362 DAG size of output: 3198 [2021-04-15 02:40:08,096 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 6502 DAG size of output: 4915 [2021-04-15 02:40:09,915 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 7134 DAG size of output: 5176 [2021-04-15 02:40:11,923 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 7390 DAG size of output: 5363 [2021-04-15 02:40:14,036 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 8060 DAG size of output: 5953 [2021-04-15 02:40:18,525 WARN L205 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 14253 DAG size of output: 11034 [2021-04-15 02:40:18,808 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1602 [2021-04-15 02:40:19,041 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1160 DAG size of output: 1319 [2021-04-15 02:40:19,274 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 1526 [2021-04-15 02:40:19,387 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 1152 [2021-04-15 02:40:19,810 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 1409 [2021-04-15 02:40:20,899 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 264 [2021-04-15 02:40:22,811 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 973 [2021-04-15 02:40:23,024 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1242 DAG size of output: 1085 [2021-04-15 02:40:26,229 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1628 DAG size of output: 1381 [2021-04-15 02:40:26,443 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1784 DAG size of output: 1462 [2021-04-15 02:40:26,778 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 1847 DAG size of output: 1518 [2021-04-15 02:40:29,478 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1534 DAG size of output: 1400 [2021-04-15 02:40:29,657 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1764 DAG size of output: 1575 [2021-04-15 02:40:29,862 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1950 DAG size of output: 1690 [2021-04-15 02:40:30,082 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 2010 DAG size of output: 1745 [2021-04-15 02:40:30,540 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 2983 DAG size of output: 2412 [2021-04-15 02:40:31,210 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 3686 DAG size of output: 2820 [2021-04-15 02:40:32,065 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 4092 DAG size of output: 3012 [2021-04-15 02:40:32,183 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1076 DAG size of output: 1076 [2021-04-15 02:40:33,921 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 810 [2021-04-15 02:40:35,515 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 886 DAG size of output: 789 [2021-04-15 02:40:35,639 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 878 [2021-04-15 02:40:38,042 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 937 DAG size of output: 842 [2021-04-15 02:40:38,291 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1196 [2021-04-15 02:40:38,636 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 1392 DAG size of output: 1260 [2021-04-15 02:40:39,020 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 1959 DAG size of output: 1730 [2021-04-15 02:40:42,328 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 775 [2021-04-15 02:40:42,511 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 877 DAG size of output: 818 [2021-04-15 02:40:42,720 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 1130 DAG size of output: 995 [2021-04-15 02:40:42,960 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1355 DAG size of output: 1124 [2021-04-15 02:40:43,663 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 444 [2021-04-15 02:40:44,629 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 803 DAG size of output: 763 [2021-04-15 02:40:44,977 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 1794 DAG size of output: 1561 [2021-04-15 02:40:45,738 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 3047 DAG size of output: 2659 [2021-04-15 02:40:46,594 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 3455 DAG size of output: 2858 [2021-04-15 02:40:48,195 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 6142 DAG size of output: 4783 [2021-04-15 02:40:49,957 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 6286 DAG size of output: 4823 [2021-04-15 02:40:51,767 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 6969 DAG size of output: 5092 [2021-04-15 02:40:53,834 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 7633 DAG size of output: 5679 [2021-04-15 02:40:54,076 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1404 [2021-04-15 02:40:54,299 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 1242 DAG size of output: 1611 [2021-04-15 02:40:54,516 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1239 DAG size of output: 1491 [2021-04-15 02:40:54,729 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1561 [2021-04-15 02:40:54,890 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1210 DAG size of output: 1238 Received shutdown request... [2021-04-15 02:40:59,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24766 [2021-04-15 02:40:59,153 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:40:59,158 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:40:59,158 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:40:59 BasicIcfg [2021-04-15 02:40:59,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:40:59,159 INFO L168 Benchmark]: Toolchain (without parser) took 857826.48 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.7 MB in the beginning and 8.4 GB in the end (delta: -8.2 GB). Peak memory consumption was 14.4 GB. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 INFO L168 Benchmark]: Boogie Preprocessor took 13.19 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 INFO L168 Benchmark]: RCFGBuilder took 250.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 234.9 MB in the end (delta: -826.1 kB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 INFO L168 Benchmark]: TraceAbstraction took 857539.71 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 234.9 MB in the beginning and 8.4 GB in the end (delta: -8.2 GB). Peak memory consumption was 14.4 GB. Max. memory is 16.0 GB. [2021-04-15 02:40:59,159 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.40 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.19 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 250.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 234.9 MB in the end (delta: -826.1 kB). Peak memory consumption was 22.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 857539.71 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 234.9 MB in the beginning and 8.4 GB in the end (delta: -8.2 GB). Peak memory consumption was 14.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 15,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: 857490.8ms, OverallIterations: 352, TraceHistogramMax: 15, EmptinessCheckTime: 2087.4ms, AutomataDifference: 115213.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7145 SDtfs, 29186 SDslu, 44197 SDs, 0 SdLazy, 53016 SolverSat, 9945 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21902.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15474 GetRequests, 6724 SyntacticMatches, 167 SemanticMatches, 8583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58266 ImplicationChecksByTransitivity, 59690.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62989occurred in iteration=351, InterpolantAutomatonStates: 7740, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 163921.2ms AutomataMinimizationTime, 351 MinimizatonAttempts, 391078 StatesRemovedByMinimization, 344 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1015.6ms SsaConstructionTime, 3554.1ms SatisfiabilityAnalysisTime, 156303.1ms InterpolantComputationTime, 14515 NumberOfCodeBlocks, 14514 NumberOfCodeBlocksAsserted, 1605 NumberOfCheckSat, 13816 ConstructedInterpolants, 0 QuantifiedInterpolants, 61740 SizeOfPredicates, 218 NumberOfNonLiveVariables, 29598 ConjunctsInSsa, 5111 ConjunctsInUnsatCore, 699 InterpolantComputations, 3 PerfectInterpolantSequences, 13443/39274 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