/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:28:48,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:28:48,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:28:48,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:28:48,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:28:48,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:28:48,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:28:48,521 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-Separate.epf [2021-06-05 15:28:48,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:28:48,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:28:48,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:28:48,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:28:48,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:28:48,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:28:48,557 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:28:48,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:28:48,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:28:48,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:28:48,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:28:48,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:28:48,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:28:48,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:28:48,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:28:48,560 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:28:48,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:28:48,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:28:48,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:28:48,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:28:48,812 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:28:48,813 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:28:48,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-06-05 15:28:48,814 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-06-05 15:28:48,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:28:48,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:28:48,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:28:48,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:28:48,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:28:48,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:28:48,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:28:48,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:28:48,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:28:48,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/1) ... [2021-06-05 15:28:48,893 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:28:48,894 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:28:48,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:28:48,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:28:48,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (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 [2021-06-05 15:28:48,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:28:48,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:28:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:28:48,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:28:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:28:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:28:48,994 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:28:48,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:28:48,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:28:48,995 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:28:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:28:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:28:48,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:28:48,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:28:48,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:28:48,997 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:28:49,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:28:49,167 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:28:49,182 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:28:49 BoogieIcfgContainer [2021-06-05 15:28:49,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:28:49,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:28:49,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:28:49,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:28:49,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:28:48" (1/2) ... [2021-06-05 15:28:49,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a86dd1 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:28:49, skipping insertion in model container [2021-06-05 15:28:49,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:28:49" (2/2) ... [2021-06-05 15:28:49,187 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-06-05 15:28:49,191 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:28:49,191 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:28:49,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:28:49,192 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:28:49,260 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:28:49,275 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:28:49,287 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:28:49,287 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:28:49,288 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:28:49,288 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:28:49,288 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:28:49,288 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:28:49,288 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:28:49,288 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:28:49,294 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-06-05 15:28:49,350 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:28:49,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:49,367 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:49,368 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash -353370600, now seen corresponding path program 1 times [2021-06-05 15:28:49,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:49,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286193439] [2021-06-05 15:28:49,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:49,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:49,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286193439] [2021-06-05 15:28:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286193439] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:49,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:49,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:28:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133676263] [2021-06-05 15:28:49,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:28:49,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:49,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:28:49,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:28:49,534 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:49,601 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-06-05 15:28:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:28:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:49,623 INFO L225 Difference]: With dead ends: 961 [2021-06-05 15:28:49,623 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 15:28:49,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 15:28:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-06-05 15:28:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-06-05 15:28:49,706 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-06-05 15:28:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:49,707 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-06-05 15:28:49,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-06-05 15:28:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:28:49,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:49,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:49,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:28:49,712 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 860248502, now seen corresponding path program 2 times [2021-06-05 15:28:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:49,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511401596] [2021-06-05 15:28:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:49,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:49,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511401596] [2021-06-05 15:28:49,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511401596] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:49,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:49,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:28:49,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99926741] [2021-06-05 15:28:49,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:28:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:28:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:49,799 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:49,918 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-06-05 15:28:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:28:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:49,928 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 15:28:49,928 INFO L226 Difference]: Without dead ends: 1497 [2021-06-05 15:28:49,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:28:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-05 15:28:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-06-05 15:28:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-06-05 15:28:49,960 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-06-05 15:28:49,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:49,961 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-06-05 15:28:49,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:49,961 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-06-05 15:28:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:28:49,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:49,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:49,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:28:49,965 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-06-05 15:28:49,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:49,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839711043] [2021-06-05 15:28:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:50,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839711043] [2021-06-05 15:28:50,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839711043] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:50,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:50,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:28:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480905779] [2021-06-05 15:28:50,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:28:50,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:28:50,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:50,028 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:50,125 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-06-05 15:28:50,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:28:50,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:50,139 INFO L225 Difference]: With dead ends: 3289 [2021-06-05 15:28:50,143 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 15:28:50,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:28:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 15:28:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-06-05 15:28:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-06-05 15:28:50,176 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-06-05 15:28:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:50,176 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-06-05 15:28:50,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-06-05 15:28:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:28:50,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:50,178 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:50,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:28:50,178 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-06-05 15:28:50,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:50,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952297169] [2021-06-05 15:28:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:50,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952297169] [2021-06-05 15:28:50,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952297169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:50,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:50,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:28:50,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442348528] [2021-06-05 15:28:50,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:28:50,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:50,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:28:50,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:28:50,222 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:50,238 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-06-05 15:28:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:28:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:50,243 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 15:28:50,243 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 15:28:50,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 15:28:50,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-06-05 15:28:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-06-05 15:28:50,262 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-06-05 15:28:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:50,262 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-06-05 15:28:50,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-06-05 15:28:50,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:50,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:50,265 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:50,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:28:50,265 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-06-05 15:28:50,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:50,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756370232] [2021-06-05 15:28:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:50,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756370232] [2021-06-05 15:28:50,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756370232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:50,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094417646] [2021-06-05 15:28:50,351 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 [2021-06-05 15:28:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:28:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094417646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:50,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:50,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:28:50,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401260024] [2021-06-05 15:28:50,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:28:50,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:28:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:28:50,529 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:50,581 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-06-05 15:28:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:28:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:28:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:50,589 INFO L225 Difference]: With dead ends: 1914 [2021-06-05 15:28:50,589 INFO L226 Difference]: Without dead ends: 1914 [2021-06-05 15:28:50,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:28:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-06-05 15:28:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-06-05 15:28:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-06-05 15:28:50,621 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-06-05 15:28:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:50,621 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-06-05 15:28:50,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-06-05 15:28:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:50,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:50,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:50,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:50,848 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash 808417752, now seen corresponding path program 1 times [2021-06-05 15:28:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:50,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797827577] [2021-06-05 15:28:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:50,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797827577] [2021-06-05 15:28:50,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797827577] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:50,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:50,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:28:50,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986203283] [2021-06-05 15:28:50,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:28:50,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:50,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:28:50,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:28:50,876 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:50,910 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-06-05 15:28:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:28:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:50,917 INFO L225 Difference]: With dead ends: 1486 [2021-06-05 15:28:50,918 INFO L226 Difference]: Without dead ends: 1456 [2021-06-05 15:28:50,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-06-05 15:28:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-06-05 15:28:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-06-05 15:28:50,947 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-06-05 15:28:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:50,947 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-06-05 15:28:50,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-06-05 15:28:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:50,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:50,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:50,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 15:28:50,951 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1237283624, now seen corresponding path program 1 times [2021-06-05 15:28:50,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:50,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475231238] [2021-06-05 15:28:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:50,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:50,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475231238] [2021-06-05 15:28:50,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475231238] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:50,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:50,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:28:50,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452232614] [2021-06-05 15:28:50,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:28:50,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:28:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:28:50,987 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:51,026 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-06-05 15:28:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:28:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:51,035 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 15:28:51,035 INFO L226 Difference]: Without dead ends: 1644 [2021-06-05 15:28:51,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-06-05 15:28:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-06-05 15:28:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-06-05 15:28:51,064 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-06-05 15:28:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:51,065 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-06-05 15:28:51,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-06-05 15:28:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:51,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:51,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:28:51,069 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-06-05 15:28:51,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:51,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916338141] [2021-06-05 15:28:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:51,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916338141] [2021-06-05 15:28:51,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916338141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351309052] [2021-06-05 15:28:51,152 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 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 [2021-06-05 15:28:51,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:51,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:28:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:51,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351309052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:51,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:51,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-06-05 15:28:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586311939] [2021-06-05 15:28:51,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:28:51,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:28:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:28:51,270 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:51,984 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-06-05 15:28:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:28:51,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:51,998 INFO L225 Difference]: With dead ends: 6173 [2021-06-05 15:28:51,999 INFO L226 Difference]: Without dead ends: 3187 [2021-06-05 15:28:51,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:28:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-06-05 15:28:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-06-05 15:28:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-06-05 15:28:52,044 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-06-05 15:28:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:52,044 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-06-05 15:28:52,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-06-05 15:28:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:52,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:52,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:52,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:52,261 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-06-05 15:28:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:52,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145778612] [2021-06-05 15:28:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:52,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:52,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145778612] [2021-06-05 15:28:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145778612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:28:52,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:28:52,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:28:52,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591937505] [2021-06-05 15:28:52,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:28:52,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:52,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:28:52,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:28:52,276 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:52,310 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-06-05 15:28:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:28:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:28:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:52,314 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 15:28:52,314 INFO L226 Difference]: Without dead ends: 1424 [2021-06-05 15:28:52,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:28:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-06-05 15:28:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-06-05 15:28:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-06-05 15:28:52,341 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-06-05 15:28:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:52,341 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-06-05 15:28:52,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-06-05 15:28:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:28:52,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:52,344 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:52,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 15:28:52,344 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-06-05 15:28:52,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:52,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441291777] [2021-06-05 15:28:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:52,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:52,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441291777] [2021-06-05 15:28:52,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441291777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:52,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510496358] [2021-06-05 15:28:52,365 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 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 [2021-06-05 15:28:52,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:28:52,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:52,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 15:28:52,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510496358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 15:28:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235274238] [2021-06-05 15:28:52,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:28:52,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:52,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:28:52,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:28:52,482 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:52,522 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-06-05 15:28:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:28:52,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:28:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:52,538 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 15:28:52,538 INFO L226 Difference]: Without dead ends: 1282 [2021-06-05 15:28:52,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:28:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-06-05 15:28:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-06-05 15:28:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-06-05 15:28:52,560 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-06-05 15:28:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:52,560 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-06-05 15:28:52,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-06-05 15:28:52,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:28:52,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:52,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:52,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:28:52,779 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-06-05 15:28:52,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:52,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184775780] [2021-06-05 15:28:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:52,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:52,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184775780] [2021-06-05 15:28:52,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184775780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:52,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177393959] [2021-06-05 15:28:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 15:28:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:28:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:53,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 15:28:53,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:53,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-06-05 15:28:53,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:28:53,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:53,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-06-05 15:28:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177393959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:53,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:53,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 15:28:53,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995981641] [2021-06-05 15:28:53,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:28:53,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:28:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:28:53,116 INFO L87 Difference]: Start difference. First operand 1044 states and 3668 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 15:28:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:53,293 INFO L93 Difference]: Finished difference Result 2466 states and 8751 transitions. [2021-06-05 15:28:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:28:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 29 [2021-06-05 15:28:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:53,298 INFO L225 Difference]: With dead ends: 2466 [2021-06-05 15:28:53,298 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 15:28:53,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:28:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 15:28:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1283. [2021-06-05 15:28:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.4672386895475817) internal successors, (4445), 1282 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4445 transitions. [2021-06-05 15:28:53,326 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4445 transitions. Word has length 29 [2021-06-05 15:28:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:53,326 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4445 transitions. [2021-06-05 15:28:53,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-06-05 15:28:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4445 transitions. [2021-06-05 15:28:53,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:28:53,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:53,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:53,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:53,545 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash -22453128, now seen corresponding path program 2 times [2021-06-05 15:28:53,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:53,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627180860] [2021-06-05 15:28:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:53,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627180860] [2021-06-05 15:28:53,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627180860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:53,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773060400] [2021-06-05 15:28:53,611 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 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 [2021-06-05 15:28:53,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:28:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-06-05 15:28:53,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:53,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-06-05 15:28:53,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:28:53,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:53,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 15:28:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:53,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773060400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:53,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:53,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 15:28:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969935358] [2021-06-05 15:28:53,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:28:53,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:28:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:28:53,754 INFO L87 Difference]: Start difference. First operand 1283 states and 4445 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:53,988 INFO L93 Difference]: Finished difference Result 2852 states and 10126 transitions. [2021-06-05 15:28:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:28:53,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:28:53,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:53,992 INFO L225 Difference]: With dead ends: 2852 [2021-06-05 15:28:53,992 INFO L226 Difference]: Without dead ends: 1150 [2021-06-05 15:28:53,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:28:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-06-05 15:28:54,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 753. [2021-06-05 15:28:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.466755319148936) internal successors, (2607), 752 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2607 transitions. [2021-06-05 15:28:54,009 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2607 transitions. Word has length 29 [2021-06-05 15:28:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:54,009 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2607 transitions. [2021-06-05 15:28:54,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2607 transitions. [2021-06-05 15:28:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:28:54,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:54,010 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:54,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 15:28:54,225 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1929474972, now seen corresponding path program 3 times [2021-06-05 15:28:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:54,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522567807] [2021-06-05 15:28:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:28:54,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:54,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522567807] [2021-06-05 15:28:54,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522567807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:54,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49974666] [2021-06-05 15:28:54,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:28:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:28:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:28:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:28:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49974666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:54,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:54,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 15:28:54,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691138574] [2021-06-05 15:28:54,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:28:54,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:28:54,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:28:54,357 INFO L87 Difference]: Start difference. First operand 753 states and 2607 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:54,732 INFO L93 Difference]: Finished difference Result 2449 states and 8696 transitions. [2021-06-05 15:28:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:28:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:28:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:54,738 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 15:28:54,738 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 15:28:54,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:28:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 15:28:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1458. [2021-06-05 15:28:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 3.723404255319149) internal successors, (5425), 1457 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 5425 transitions. [2021-06-05 15:28:54,773 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 5425 transitions. Word has length 31 [2021-06-05 15:28:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:54,774 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 5425 transitions. [2021-06-05 15:28:54,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 5425 transitions. [2021-06-05 15:28:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:28:54,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:54,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:54,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:54,996 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash 215625022, now seen corresponding path program 4 times [2021-06-05 15:28:54,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:54,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912810847] [2021-06-05 15:28:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:55,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:55,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912810847] [2021-06-05 15:28:55,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912810847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:55,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590634506] [2021-06-05 15:28:55,019 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 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 [2021-06-05 15:28:55,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:28:55,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:28:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:28:55,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590634506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:55,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:55,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:28:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275330341] [2021-06-05 15:28:55,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:28:55,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:28:55,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:28:55,099 INFO L87 Difference]: Start difference. First operand 1458 states and 5425 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:55,158 INFO L93 Difference]: Finished difference Result 3104 states and 11373 transitions. [2021-06-05 15:28:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:28:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:28:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:55,166 INFO L225 Difference]: With dead ends: 3104 [2021-06-05 15:28:55,166 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 15:28:55,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:28:55,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 15:28:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1644. [2021-06-05 15:28:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.837492391965916) internal successors, (6305), 1643 states have internal predecessors, (6305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 6305 transitions. [2021-06-05 15:28:55,209 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 6305 transitions. Word has length 33 [2021-06-05 15:28:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:55,209 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 6305 transitions. [2021-06-05 15:28:55,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 6305 transitions. [2021-06-05 15:28:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:28:55,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:55,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:28:55,425 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1617454150, now seen corresponding path program 5 times [2021-06-05 15:28:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84471522] [2021-06-05 15:28:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84471522] [2021-06-05 15:28:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84471522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51437810] [2021-06-05 15:28:55,448 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 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 [2021-06-05 15:28:55,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:28:55,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:28:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:55,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51437810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:55,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:55,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:28:55,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708547848] [2021-06-05 15:28:55,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:28:55,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:28:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:28:55,547 INFO L87 Difference]: Start difference. First operand 1644 states and 6305 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:55,616 INFO L93 Difference]: Finished difference Result 3039 states and 11040 transitions. [2021-06-05 15:28:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:28:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:28:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:55,623 INFO L225 Difference]: With dead ends: 3039 [2021-06-05 15:28:55,623 INFO L226 Difference]: Without dead ends: 3039 [2021-06-05 15:28:55,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:28:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-06-05 15:28:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 1619. [2021-06-05 15:28:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.857849196538937) internal successors, (6242), 1618 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 6242 transitions. [2021-06-05 15:28:55,663 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 6242 transitions. Word has length 33 [2021-06-05 15:28:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:55,663 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 6242 transitions. [2021-06-05 15:28:55,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 6242 transitions. [2021-06-05 15:28:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:28:55,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:55,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:55,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:28:55,873 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:55,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:55,873 INFO L82 PathProgramCache]: Analyzing trace with hash -461930502, now seen corresponding path program 6 times [2021-06-05 15:28:55,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:55,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790958032] [2021-06-05 15:28:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:55,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790958032] [2021-06-05 15:28:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790958032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:55,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727426488] [2021-06-05 15:28:55,929 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:55,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:28:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:55,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:28:55,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:28:56,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727426488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:56,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:56,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 15:28:56,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432812293] [2021-06-05 15:28:56,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:28:56,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:28:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:28:56,058 INFO L87 Difference]: Start difference. First operand 1619 states and 6242 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:56,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:56,579 INFO L93 Difference]: Finished difference Result 7858 states and 29355 transitions. [2021-06-05 15:28:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:28:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:28:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:56,594 INFO L225 Difference]: With dead ends: 7858 [2021-06-05 15:28:56,594 INFO L226 Difference]: Without dead ends: 7378 [2021-06-05 15:28:56,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:28:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-06-05 15:28:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3747. [2021-06-05 15:28:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 4.203150026695141) internal successors, (15745), 3746 states have internal predecessors, (15745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 15745 transitions. [2021-06-05 15:28:56,701 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 15745 transitions. Word has length 33 [2021-06-05 15:28:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:56,701 INFO L482 AbstractCegarLoop]: Abstraction has 3747 states and 15745 transitions. [2021-06-05 15:28:56,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 15745 transitions. [2021-06-05 15:28:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:28:56,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:56,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:56,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:28:56,925 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 685612088, now seen corresponding path program 7 times [2021-06-05 15:28:56,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:56,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954741717] [2021-06-05 15:28:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:56,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:56,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954741717] [2021-06-05 15:28:56,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954741717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:56,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914876297] [2021-06-05 15:28:56,947 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 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 [2021-06-05 15:28:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:28:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:28:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914876297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:57,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:57,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:28:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874840479] [2021-06-05 15:28:57,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:28:57,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:28:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:28:57,035 INFO L87 Difference]: Start difference. First operand 3747 states and 15745 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:57,134 INFO L93 Difference]: Finished difference Result 5515 states and 21821 transitions. [2021-06-05 15:28:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:28:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:28:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:57,145 INFO L225 Difference]: With dead ends: 5515 [2021-06-05 15:28:57,145 INFO L226 Difference]: Without dead ends: 5515 [2021-06-05 15:28:57,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:28:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2021-06-05 15:28:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3848. [2021-06-05 15:28:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.193137509747856) internal successors, (16131), 3847 states have internal predecessors, (16131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16131 transitions. [2021-06-05 15:28:57,226 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16131 transitions. Word has length 33 [2021-06-05 15:28:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:57,226 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16131 transitions. [2021-06-05 15:28:57,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16131 transitions. [2021-06-05 15:28:57,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:28:57,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:57,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:57,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:28:57,453 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:57,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1338680964, now seen corresponding path program 8 times [2021-06-05 15:28:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:57,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851227157] [2021-06-05 15:28:57,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:57,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851227157] [2021-06-05 15:28:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851227157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638776338] [2021-06-05 15:28:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:28:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:28:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:28:57,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638776338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:57,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:57,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:28:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085026044] [2021-06-05 15:28:57,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:28:57,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:57,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:28:57,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:28:57,582 INFO L87 Difference]: Start difference. First operand 3848 states and 16131 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:57,669 INFO L93 Difference]: Finished difference Result 5599 states and 22264 transitions. [2021-06-05 15:28:57,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:28:57,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:28:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:57,681 INFO L225 Difference]: With dead ends: 5599 [2021-06-05 15:28:57,681 INFO L226 Difference]: Without dead ends: 5599 [2021-06-05 15:28:57,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:28:57,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-06-05 15:28:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 4158. [2021-06-05 15:28:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.1554005292278084) internal successors, (17274), 4157 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17274 transitions. [2021-06-05 15:28:57,764 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17274 transitions. Word has length 33 [2021-06-05 15:28:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:57,764 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17274 transitions. [2021-06-05 15:28:57,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17274 transitions. [2021-06-05 15:28:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:28:57,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:57,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:28:57,985 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1085770464, now seen corresponding path program 9 times [2021-06-05 15:28:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974577171] [2021-06-05 15:28:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:28:58,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:58,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974577171] [2021-06-05 15:28:58,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974577171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:58,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075703422] [2021-06-05 15:28:58,139 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 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 [2021-06-05 15:28:58,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:28:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:28:58,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:28:58,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:28:58,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:28:58,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:58,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:28:58,361 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-05 15:28:58,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-06-05 15:28:58,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:58,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 15:28:58,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:58,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:28:58,460 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:43 [2021-06-05 15:28:58,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:28:58,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,696 INFO L628 ElimStorePlain]: treesize reduction 27, result has 55.0 percent of original size [2021-06-05 15:28:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:28:58,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,704 INFO L628 ElimStorePlain]: treesize reduction 6, result has 45.5 percent of original size [2021-06-05 15:28:58,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:58,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:5 [2021-06-05 15:28:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075703422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:58,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:58,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2021-06-05 15:28:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109769586] [2021-06-05 15:28:58,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:28:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:28:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:28:58,718 INFO L87 Difference]: Start difference. First operand 4158 states and 17274 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:59,643 INFO L93 Difference]: Finished difference Result 9317 states and 38403 transitions. [2021-06-05 15:28:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:28:59,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:28:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:59,652 INFO L225 Difference]: With dead ends: 9317 [2021-06-05 15:28:59,652 INFO L226 Difference]: Without dead ends: 4302 [2021-06-05 15:28:59,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:28:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-05 15:28:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 4250. [2021-06-05 15:28:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 4.120498940927277) internal successors, (17508), 4249 states have internal predecessors, (17508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 17508 transitions. [2021-06-05 15:28:59,753 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 17508 transitions. Word has length 35 [2021-06-05 15:28:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:59,753 INFO L482 AbstractCegarLoop]: Abstraction has 4250 states and 17508 transitions. [2021-06-05 15:28:59,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 17508 transitions. [2021-06-05 15:28:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:28:59,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:59,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:59,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:59,978 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -436856958, now seen corresponding path program 10 times [2021-06-05 15:28:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:59,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952419854] [2021-06-05 15:28:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:00,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952419854] [2021-06-05 15:29:00,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952419854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:00,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074679481] [2021-06-05 15:29:00,100 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 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 [2021-06-05 15:29:00,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:00,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:29:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:00,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:00,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:00,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:00,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:00,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:00,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:00,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:53, output treesize:39 [2021-06-05 15:29:00,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:00,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:00,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:00,387 INFO L628 ElimStorePlain]: treesize reduction 23, result has 11.5 percent of original size [2021-06-05 15:29:00,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-06-05 15:29:00,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:00,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:3 [2021-06-05 15:29:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074679481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:00,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:00,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-05 15:29:00,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488198897] [2021-06-05 15:29:00,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:29:00,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:29:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:29:00,400 INFO L87 Difference]: Start difference. First operand 4250 states and 17508 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:01,018 INFO L93 Difference]: Finished difference Result 9382 states and 37522 transitions. [2021-06-05 15:29:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:29:01,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:29:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:01,028 INFO L225 Difference]: With dead ends: 9382 [2021-06-05 15:29:01,028 INFO L226 Difference]: Without dead ends: 4508 [2021-06-05 15:29:01,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:29:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2021-06-05 15:29:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4326. [2021-06-05 15:29:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 4.0920231213872835) internal successors, (17698), 4325 states have internal predecessors, (17698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 17698 transitions. [2021-06-05 15:29:01,142 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 17698 transitions. Word has length 35 [2021-06-05 15:29:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:01,142 INFO L482 AbstractCegarLoop]: Abstraction has 4326 states and 17698 transitions. [2021-06-05 15:29:01,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 17698 transitions. [2021-06-05 15:29:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:01,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:01,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:01,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:29:01,365 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash 804357182, now seen corresponding path program 11 times [2021-06-05 15:29:01,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:01,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098233185] [2021-06-05 15:29:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:29:01,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098233185] [2021-06-05 15:29:01,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098233185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:01,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200500041] [2021-06-05 15:29:01,390 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 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 [2021-06-05 15:29:01,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:29:01,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:29:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200500041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:01,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:01,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:29:01,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139903714] [2021-06-05 15:29:01,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:29:01,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:29:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:01,476 INFO L87 Difference]: Start difference. First operand 4326 states and 17698 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-06-05 15:29:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:01,559 INFO L93 Difference]: Finished difference Result 6092 states and 23684 transitions. [2021-06-05 15:29:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:29:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:01,571 INFO L225 Difference]: With dead ends: 6092 [2021-06-05 15:29:01,571 INFO L226 Difference]: Without dead ends: 6080 [2021-06-05 15:29:01,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-06-05 15:29:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4576. [2021-06-05 15:29:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.078032786885246) internal successors, (18657), 4575 states have internal predecessors, (18657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18657 transitions. [2021-06-05 15:29:01,675 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18657 transitions. Word has length 37 [2021-06-05 15:29:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:01,675 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 18657 transitions. [2021-06-05 15:29:01,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-06-05 15:29:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18657 transitions. [2021-06-05 15:29:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:01,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:01,684 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:01,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:01,901 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash 550256378, now seen corresponding path program 12 times [2021-06-05 15:29:01,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:01,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779295034] [2021-06-05 15:29:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:01,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:01,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779295034] [2021-06-05 15:29:01,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779295034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:01,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194957369] [2021-06-05 15:29:01,932 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 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 [2021-06-05 15:29:01,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:29:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:29:02,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194957369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:02,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:02,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:29:02,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581920136] [2021-06-05 15:29:02,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:29:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:29:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:02,005 INFO L87 Difference]: Start difference. First operand 4576 states and 18657 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:02,104 INFO L93 Difference]: Finished difference Result 9156 states and 35918 transitions. [2021-06-05 15:29:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:29:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:02,122 INFO L225 Difference]: With dead ends: 9156 [2021-06-05 15:29:02,123 INFO L226 Difference]: Without dead ends: 9136 [2021-06-05 15:29:02,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-06-05 15:29:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 5812. [2021-06-05 15:29:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 4.22715539494063) internal successors, (24564), 5811 states have internal predecessors, (24564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 24564 transitions. [2021-06-05 15:29:02,298 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 24564 transitions. Word has length 37 [2021-06-05 15:29:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:02,298 INFO L482 AbstractCegarLoop]: Abstraction has 5812 states and 24564 transitions. [2021-06-05 15:29:02,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 24564 transitions. [2021-06-05 15:29:02,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:02,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:02,310 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:02,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:29:02,526 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:02,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:02,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1282822794, now seen corresponding path program 13 times [2021-06-05 15:29:02,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:02,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861940987] [2021-06-05 15:29:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:29:02,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861940987] [2021-06-05 15:29:02,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861940987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:02,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009271565] [2021-06-05 15:29:02,557 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 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 [2021-06-05 15:29:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:29:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009271565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:02,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:02,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:29:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013350569] [2021-06-05 15:29:02,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:29:02,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:29:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:02,654 INFO L87 Difference]: Start difference. First operand 5812 states and 24564 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:02,755 INFO L93 Difference]: Finished difference Result 9442 states and 37337 transitions. [2021-06-05 15:29:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:29:02,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:02,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:02,774 INFO L225 Difference]: With dead ends: 9442 [2021-06-05 15:29:02,774 INFO L226 Difference]: Without dead ends: 9442 [2021-06-05 15:29:02,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:29:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9442 states. [2021-06-05 15:29:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9442 to 5125. [2021-06-05 15:29:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 4.132708821233411) internal successors, (21176), 5124 states have internal predecessors, (21176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 21176 transitions. [2021-06-05 15:29:02,894 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 21176 transitions. Word has length 37 [2021-06-05 15:29:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:02,894 INFO L482 AbstractCegarLoop]: Abstraction has 5125 states and 21176 transitions. [2021-06-05 15:29:02,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:02,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 21176 transitions. [2021-06-05 15:29:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:02,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:02,904 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:03,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:03,105 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash 987851450, now seen corresponding path program 14 times [2021-06-05 15:29:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:03,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184572740] [2021-06-05 15:29:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:03,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:03,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184572740] [2021-06-05 15:29:03,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184572740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:03,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360296922] [2021-06-05 15:29:03,145 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 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 [2021-06-05 15:29:03,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:03,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360296922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:03,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:03,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:29:03,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198428315] [2021-06-05 15:29:03,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:29:03,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:29:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:29:03,218 INFO L87 Difference]: Start difference. First operand 5125 states and 21176 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:03,328 INFO L93 Difference]: Finished difference Result 8511 states and 32921 transitions. [2021-06-05 15:29:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:29:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:03,345 INFO L225 Difference]: With dead ends: 8511 [2021-06-05 15:29:03,345 INFO L226 Difference]: Without dead ends: 8511 [2021-06-05 15:29:03,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:29:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8511 states. [2021-06-05 15:29:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8511 to 4053. [2021-06-05 15:29:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 4.028874629812439) internal successors, (16325), 4052 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 16325 transitions. [2021-06-05 15:29:03,499 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 16325 transitions. Word has length 37 [2021-06-05 15:29:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:03,500 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 16325 transitions. [2021-06-05 15:29:03,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 16325 transitions. [2021-06-05 15:29:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:03,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:03,508 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:03,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:29:03,722 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1447205570, now seen corresponding path program 15 times [2021-06-05 15:29:03,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:03,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732186052] [2021-06-05 15:29:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:03,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732186052] [2021-06-05 15:29:03,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732186052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:03,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757525385] [2021-06-05 15:29:03,755 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 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 [2021-06-05 15:29:03,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:29:03,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:29:03,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757525385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:03,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:03,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 15:29:03,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948220007] [2021-06-05 15:29:03,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:29:03,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:29:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:29:03,904 INFO L87 Difference]: Start difference. First operand 4053 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:04,899 INFO L93 Difference]: Finished difference Result 11628 states and 44736 transitions. [2021-06-05 15:29:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:29:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:04,925 INFO L225 Difference]: With dead ends: 11628 [2021-06-05 15:29:04,925 INFO L226 Difference]: Without dead ends: 11024 [2021-06-05 15:29:04,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=1036, Invalid=3520, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:29:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11024 states. [2021-06-05 15:29:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11024 to 5085. [2021-06-05 15:29:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5085 states, 5084 states have (on average 4.030881195908734) internal successors, (20493), 5084 states have internal predecessors, (20493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5085 states to 5085 states and 20493 transitions. [2021-06-05 15:29:05,113 INFO L78 Accepts]: Start accepts. Automaton has 5085 states and 20493 transitions. Word has length 37 [2021-06-05 15:29:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:05,113 INFO L482 AbstractCegarLoop]: Abstraction has 5085 states and 20493 transitions. [2021-06-05 15:29:05,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5085 states and 20493 transitions. [2021-06-05 15:29:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:29:05,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:05,126 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:05,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:29:05,342 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:05,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2010083624, now seen corresponding path program 16 times [2021-06-05 15:29:05,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:05,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771473212] [2021-06-05 15:29:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:05,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:05,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771473212] [2021-06-05 15:29:05,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771473212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:05,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118837671] [2021-06-05 15:29:05,375 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 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 [2021-06-05 15:29:05,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 15:29:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:05,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118837671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:05,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:05,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:29:05,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630668350] [2021-06-05 15:29:05,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:29:05,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:29:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:05,467 INFO L87 Difference]: Start difference. First operand 5085 states and 20493 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:05,604 INFO L93 Difference]: Finished difference Result 12069 states and 47387 transitions. [2021-06-05 15:29:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:29:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:29:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:05,629 INFO L225 Difference]: With dead ends: 12069 [2021-06-05 15:29:05,629 INFO L226 Difference]: Without dead ends: 12069 [2021-06-05 15:29:05,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:29:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12069 states. [2021-06-05 15:29:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12069 to 8160. [2021-06-05 15:29:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 4.160804020100502) internal successors, (33948), 8159 states have internal predecessors, (33948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 33948 transitions. [2021-06-05 15:29:05,793 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 33948 transitions. Word has length 39 [2021-06-05 15:29:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:05,793 INFO L482 AbstractCegarLoop]: Abstraction has 8160 states and 33948 transitions. [2021-06-05 15:29:05,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 33948 transitions. [2021-06-05 15:29:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:29:05,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:05,807 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:06,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:29:06,008 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash -657746618, now seen corresponding path program 17 times [2021-06-05 15:29:06,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:06,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764314774] [2021-06-05 15:29:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 15:29:06,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:06,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764314774] [2021-06-05 15:29:06,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764314774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:06,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63966726] [2021-06-05 15:29:06,047 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 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 [2021-06-05 15:29:06,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:29:06,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:29:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63966726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:06,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:06,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 15:29:06,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430752230] [2021-06-05 15:29:06,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:29:06,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:29:06,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:29:06,199 INFO L87 Difference]: Start difference. First operand 8160 states and 33948 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:07,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:07,481 INFO L93 Difference]: Finished difference Result 26614 states and 103468 transitions. [2021-06-05 15:29:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 15:29:07,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:29:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:07,551 INFO L225 Difference]: With dead ends: 26614 [2021-06-05 15:29:07,551 INFO L226 Difference]: Without dead ends: 25436 [2021-06-05 15:29:07,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=1482, Invalid=5658, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:29:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25436 states. [2021-06-05 15:29:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25436 to 15198. [2021-06-05 15:29:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15198 states, 15197 states have (on average 4.284727248799105) internal successors, (65115), 15197 states have internal predecessors, (65115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15198 states to 15198 states and 65115 transitions. [2021-06-05 15:29:08,049 INFO L78 Accepts]: Start accepts. Automaton has 15198 states and 65115 transitions. Word has length 41 [2021-06-05 15:29:08,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:08,049 INFO L482 AbstractCegarLoop]: Abstraction has 15198 states and 65115 transitions. [2021-06-05 15:29:08,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 15198 states and 65115 transitions. [2021-06-05 15:29:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:29:08,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:08,079 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:08,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:29:08,285 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash -869101180, now seen corresponding path program 18 times [2021-06-05 15:29:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:08,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143876547] [2021-06-05 15:29:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:08,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:08,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143876547] [2021-06-05 15:29:08,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143876547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:08,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013136175] [2021-06-05 15:29:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:29:08,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:29:08,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:29:08,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 15:29:08,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013136175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:08,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:08,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 15:29:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287457784] [2021-06-05 15:29:08,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:29:08,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:08,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:29:08,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:29:08,452 INFO L87 Difference]: Start difference. First operand 15198 states and 65115 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:09,454 INFO L93 Difference]: Finished difference Result 62455 states and 251410 transitions. [2021-06-05 15:29:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:29:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:29:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:09,790 INFO L225 Difference]: With dead ends: 62455 [2021-06-05 15:29:09,790 INFO L226 Difference]: Without dead ends: 62455 [2021-06-05 15:29:09,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:29:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62455 states. [2021-06-05 15:29:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62455 to 31961. [2021-06-05 15:29:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31961 states, 31960 states have (on average 4.464518147684606) internal successors, (142686), 31960 states have internal predecessors, (142686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31961 states to 31961 states and 142686 transitions. [2021-06-05 15:29:11,066 INFO L78 Accepts]: Start accepts. Automaton has 31961 states and 142686 transitions. Word has length 41 [2021-06-05 15:29:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 31961 states and 142686 transitions. [2021-06-05 15:29:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31961 states and 142686 transitions. [2021-06-05 15:29:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:29:11,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:11,151 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:11,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:11,367 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1576576382, now seen corresponding path program 19 times [2021-06-05 15:29:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:11,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114881784] [2021-06-05 15:29:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:11,768 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-06-05 15:29:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:11,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:11,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114881784] [2021-06-05 15:29:11,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114881784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:11,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775184717] [2021-06-05 15:29:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:29:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:29:11,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:11,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:29:11,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 13 [2021-06-05 15:29:11,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:11,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:11,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:11,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:19 [2021-06-05 15:29:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 15:29:12,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:12,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-06-05 15:29:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-06-05 15:29:12,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:12,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2021-06-05 15:29:12,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:12,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-06-05 15:29:12,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 15:29:12,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2021-06-05 15:29:12,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:12,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:12,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:39, output treesize:5 [2021-06-05 15:29:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775184717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:12,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 15:29:12,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534847974] [2021-06-05 15:29:12,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:29:12,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:12,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:29:12,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:29:12,381 INFO L87 Difference]: Start difference. First operand 31961 states and 142686 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:13,911 INFO L93 Difference]: Finished difference Result 59369 states and 262032 transitions. [2021-06-05 15:29:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:29:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:29:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:14,014 INFO L225 Difference]: With dead ends: 59369 [2021-06-05 15:29:14,014 INFO L226 Difference]: Without dead ends: 32918 [2021-06-05 15:29:14,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1074.4ms TimeCoverageRelationStatistics Valid=342, Invalid=1820, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:29:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32918 states. [2021-06-05 15:29:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32918 to 31837. [2021-06-05 15:29:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31837 states, 31836 states have (on average 4.452538007287347) internal successors, (141751), 31836 states have internal predecessors, (141751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31837 states to 31837 states and 141751 transitions. [2021-06-05 15:29:14,782 INFO L78 Accepts]: Start accepts. Automaton has 31837 states and 141751 transitions. Word has length 41 [2021-06-05 15:29:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:14,782 INFO L482 AbstractCegarLoop]: Abstraction has 31837 states and 141751 transitions. [2021-06-05 15:29:14,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 31837 states and 141751 transitions. [2021-06-05 15:29:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:29:14,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:14,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:15,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:15,051 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:15,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:15,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1594180734, now seen corresponding path program 20 times [2021-06-05 15:29:15,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:15,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484746672] [2021-06-05 15:29:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:29:15,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484746672] [2021-06-05 15:29:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484746672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356840903] [2021-06-05 15:29:15,182 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 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 [2021-06-05 15:29:15,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:29:15,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:15,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 15:29:15,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:15,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-05 15:29:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:15,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:15,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:15,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:15,630 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-05 15:29:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-05 15:29:15,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:15,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-05 15:29:15,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:15,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:15,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-06-05 15:29:15,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:15,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 15:29:15,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:15,952 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-05 15:29:15,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:29:15,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:15,995 INFO L628 ElimStorePlain]: treesize reduction 5, result has 93.5 percent of original size [2021-06-05 15:29:16,000 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 15:29:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:16,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,010 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 15:29:16,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 15:29:16,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,017 INFO L628 ElimStorePlain]: treesize reduction 20, result has 20.0 percent of original size [2021-06-05 15:29:16,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,018 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-06-05 15:29:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:29:16,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356840903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:16,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:16,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 15:29:16,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161559662] [2021-06-05 15:29:16,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:29:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:29:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:29:16,036 INFO L87 Difference]: Start difference. First operand 31837 states and 141751 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:17,189 INFO L93 Difference]: Finished difference Result 71320 states and 312582 transitions. [2021-06-05 15:29:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:29:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:29:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:17,315 INFO L225 Difference]: With dead ends: 71320 [2021-06-05 15:29:17,315 INFO L226 Difference]: Without dead ends: 40777 [2021-06-05 15:29:17,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:29:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40777 states. [2021-06-05 15:29:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40777 to 31018. [2021-06-05 15:29:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31018 states, 31017 states have (on average 4.447851178386046) internal successors, (137959), 31017 states have internal predecessors, (137959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31018 states to 31018 states and 137959 transitions. [2021-06-05 15:29:18,294 INFO L78 Accepts]: Start accepts. Automaton has 31018 states and 137959 transitions. Word has length 41 [2021-06-05 15:29:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:18,294 INFO L482 AbstractCegarLoop]: Abstraction has 31018 states and 137959 transitions. [2021-06-05 15:29:18,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 31018 states and 137959 transitions. [2021-06-05 15:29:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:29:18,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:18,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:18,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:18,561 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1350520954, now seen corresponding path program 21 times [2021-06-05 15:29:18,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:18,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137109284] [2021-06-05 15:29:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:18,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:18,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137109284] [2021-06-05 15:29:18,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137109284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:18,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202586200] [2021-06-05 15:29:18,640 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 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 [2021-06-05 15:29:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:29:18,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:18,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:29:18,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:18,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-06-05 15:29:18,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:18,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2021-06-05 15:29:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:18,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2021-06-05 15:29:18,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:18,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:14 [2021-06-05 15:29:18,783 INFO L354 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2021-06-05 15:29:18,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 30 [2021-06-05 15:29:18,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:18,805 INFO L628 ElimStorePlain]: treesize reduction 15, result has 67.4 percent of original size [2021-06-05 15:29:18,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:28 [2021-06-05 15:29:18,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:18,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 15:29:18,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:18,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:18,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 15:29:18,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:18,974 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 15:29:18,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:29:18,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:18,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 15:29:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:29:18,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:19,000 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-06-05 15:29:19,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:19,000 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 15:29:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:29:19,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202586200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:19,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:19,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-05 15:29:19,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619050112] [2021-06-05 15:29:19,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:29:19,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:29:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:29:19,105 INFO L87 Difference]: Start difference. First operand 31018 states and 137959 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:19,256 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-06-05 15:29:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:20,648 INFO L93 Difference]: Finished difference Result 89629 states and 388893 transitions. [2021-06-05 15:29:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:29:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:29:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:20,729 INFO L225 Difference]: With dead ends: 89629 [2021-06-05 15:29:20,729 INFO L226 Difference]: Without dead ends: 24194 [2021-06-05 15:29:20,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24194 states. [2021-06-05 15:29:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24194 to 24194. [2021-06-05 15:29:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24194 states, 24193 states have (on average 4.4164014384326045) internal successors, (106846), 24193 states have internal predecessors, (106846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24194 states to 24194 states and 106846 transitions. [2021-06-05 15:29:21,174 INFO L78 Accepts]: Start accepts. Automaton has 24194 states and 106846 transitions. Word has length 41 [2021-06-05 15:29:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:21,174 INFO L482 AbstractCegarLoop]: Abstraction has 24194 states and 106846 transitions. [2021-06-05 15:29:21,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24194 states and 106846 transitions. [2021-06-05 15:29:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:21,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:21,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:21,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:21,664 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash 579617674, now seen corresponding path program 22 times [2021-06-05 15:29:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:21,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543803645] [2021-06-05 15:29:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:21,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:21,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543803645] [2021-06-05 15:29:21,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543803645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:21,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200483262] [2021-06-05 15:29:21,710 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 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 [2021-06-05 15:29:21,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:21,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:29:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200483262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:21,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:21,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 15:29:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949453637] [2021-06-05 15:29:21,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:29:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:29:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:21,843 INFO L87 Difference]: Start difference. First operand 24194 states and 106846 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:22,132 INFO L93 Difference]: Finished difference Result 31728 states and 133271 transitions. [2021-06-05 15:29:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:29:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:29:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:22,220 INFO L225 Difference]: With dead ends: 31728 [2021-06-05 15:29:22,220 INFO L226 Difference]: Without dead ends: 31708 [2021-06-05 15:29:22,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:29:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31708 states. [2021-06-05 15:29:22,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31708 to 20545. [2021-06-05 15:29:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338492990654205) internal successors, (89130), 20544 states have internal predecessors, (89130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89130 transitions. [2021-06-05 15:29:22,820 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89130 transitions. Word has length 43 [2021-06-05 15:29:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:22,820 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89130 transitions. [2021-06-05 15:29:22,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89130 transitions. [2021-06-05 15:29:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:22,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:22,858 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:23,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:29:23,072 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 856538626, now seen corresponding path program 23 times [2021-06-05 15:29:23,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:23,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200037344] [2021-06-05 15:29:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 15:29:23,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:23,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200037344] [2021-06-05 15:29:23,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200037344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:23,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152927550] [2021-06-05 15:29:23,098 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 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 [2021-06-05 15:29:23,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 15:29:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:23,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:23,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 15:29:23,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152927550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:23,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:23,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:29:23,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326937676] [2021-06-05 15:29:23,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:29:23,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:23,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:29:23,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:29:23,231 INFO L87 Difference]: Start difference. First operand 20545 states and 89130 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-06-05 15:29:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:23,432 INFO L93 Difference]: Finished difference Result 25792 states and 107062 transitions. [2021-06-05 15:29:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:29:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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 43 [2021-06-05 15:29:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:23,512 INFO L225 Difference]: With dead ends: 25792 [2021-06-05 15:29:23,512 INFO L226 Difference]: Without dead ends: 25788 [2021-06-05 15:29:23,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:29:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25788 states. [2021-06-05 15:29:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25788 to 20545. [2021-06-05 15:29:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20545 states, 20544 states have (on average 4.338395638629284) internal successors, (89128), 20544 states have internal predecessors, (89128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20545 states to 20545 states and 89128 transitions. [2021-06-05 15:29:24,115 INFO L78 Accepts]: Start accepts. Automaton has 20545 states and 89128 transitions. Word has length 43 [2021-06-05 15:29:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:24,115 INFO L482 AbstractCegarLoop]: Abstraction has 20545 states and 89128 transitions. [2021-06-05 15:29:24,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 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) [2021-06-05 15:29:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20545 states and 89128 transitions. [2021-06-05 15:29:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:24,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:24,155 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 15:29:24,356 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1826733498, now seen corresponding path program 24 times [2021-06-05 15:29:24,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:24,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690407322] [2021-06-05 15:29:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:24,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:24,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690407322] [2021-06-05 15:29:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690407322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:24,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458286188] [2021-06-05 15:29:24,397 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 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 [2021-06-05 15:29:24,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:29:24,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:24,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458286188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:24,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:24,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 15:29:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511792024] [2021-06-05 15:29:24,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:29:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:29:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:24,513 INFO L87 Difference]: Start difference. First operand 20545 states and 89128 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:24,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:24,783 INFO L93 Difference]: Finished difference Result 29923 states and 123633 transitions. [2021-06-05 15:29:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:29:24,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:29:24,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:24,873 INFO L225 Difference]: With dead ends: 29923 [2021-06-05 15:29:24,873 INFO L226 Difference]: Without dead ends: 29911 [2021-06-05 15:29:24,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:29:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29911 states. [2021-06-05 15:29:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29911 to 22182. [2021-06-05 15:29:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22182 states, 22181 states have (on average 4.363960146070962) internal successors, (96797), 22181 states have internal predecessors, (96797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 96797 transitions. [2021-06-05 15:29:25,559 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 96797 transitions. Word has length 43 [2021-06-05 15:29:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:25,560 INFO L482 AbstractCegarLoop]: Abstraction has 22182 states and 96797 transitions. [2021-06-05 15:29:25,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 96797 transitions. [2021-06-05 15:29:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:25,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:25,600 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:25,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:29:25,801 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:25,801 INFO L82 PathProgramCache]: Analyzing trace with hash 733833666, now seen corresponding path program 25 times [2021-06-05 15:29:25,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:25,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414995561] [2021-06-05 15:29:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:25,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:25,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414995561] [2021-06-05 15:29:25,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414995561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:25,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895990975] [2021-06-05 15:29:25,834 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 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 [2021-06-05 15:29:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:25,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:29:25,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895990975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:25,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:25,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:29:25,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078961228] [2021-06-05 15:29:25,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:29:25,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:29:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:29:25,921 INFO L87 Difference]: Start difference. First operand 22182 states and 96797 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:26,463 INFO L93 Difference]: Finished difference Result 34390 states and 141751 transitions. [2021-06-05 15:29:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:29:26,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:29:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:26,567 INFO L225 Difference]: With dead ends: 34390 [2021-06-05 15:29:26,567 INFO L226 Difference]: Without dead ends: 34390 [2021-06-05 15:29:26,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:29:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34390 states. [2021-06-05 15:29:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34390 to 22406. [2021-06-05 15:29:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22406 states, 22405 states have (on average 4.360365989734435) internal successors, (97694), 22405 states have internal predecessors, (97694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22406 states to 22406 states and 97694 transitions. [2021-06-05 15:29:27,290 INFO L78 Accepts]: Start accepts. Automaton has 22406 states and 97694 transitions. Word has length 43 [2021-06-05 15:29:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:27,290 INFO L482 AbstractCegarLoop]: Abstraction has 22406 states and 97694 transitions. [2021-06-05 15:29:27,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 22406 states and 97694 transitions. [2021-06-05 15:29:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:27,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:27,351 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:27,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:27,551 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1750646786, now seen corresponding path program 26 times [2021-06-05 15:29:27,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:27,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755761344] [2021-06-05 15:29:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:27,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:27,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755761344] [2021-06-05 15:29:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755761344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:27,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66002141] [2021-06-05 15:29:27,583 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 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 [2021-06-05 15:29:27,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66002141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:27,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:27,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 15:29:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126065121] [2021-06-05 15:29:27,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:29:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:29:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:29:27,671 INFO L87 Difference]: Start difference. First operand 22406 states and 97694 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:27,951 INFO L93 Difference]: Finished difference Result 38562 states and 161998 transitions. [2021-06-05 15:29:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:29:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:29:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:28,071 INFO L225 Difference]: With dead ends: 38562 [2021-06-05 15:29:28,071 INFO L226 Difference]: Without dead ends: 38558 [2021-06-05 15:29:28,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:29:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38558 states. [2021-06-05 15:29:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38558 to 29258. [2021-06-05 15:29:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29258 states, 29257 states have (on average 4.442629114399972) internal successors, (129978), 29257 states have internal predecessors, (129978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29258 states to 29258 states and 129978 transitions. [2021-06-05 15:29:28,981 INFO L78 Accepts]: Start accepts. Automaton has 29258 states and 129978 transitions. Word has length 43 [2021-06-05 15:29:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:28,981 INFO L482 AbstractCegarLoop]: Abstraction has 29258 states and 129978 transitions. [2021-06-05 15:29:28,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29258 states and 129978 transitions. [2021-06-05 15:29:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:29:29,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:29,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:29,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:29,251 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1098153854, now seen corresponding path program 27 times [2021-06-05 15:29:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:29,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425611321] [2021-06-05 15:29:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 15:29:29,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:29,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425611321] [2021-06-05 15:29:29,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425611321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:29,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706237516] [2021-06-05 15:29:29,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 15:29:29,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 15:29:29,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:29,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:29:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:29:29,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706237516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:29,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:29,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-06-05 15:29:29,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036311033] [2021-06-05 15:29:29,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:29:29,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:29,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:29:29,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:29:29,460 INFO L87 Difference]: Start difference. First operand 29258 states and 129978 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:32,042 INFO L93 Difference]: Finished difference Result 130071 states and 514816 transitions. [2021-06-05 15:29:32,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 15:29:32,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:29:32,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:32,436 INFO L225 Difference]: With dead ends: 130071 [2021-06-05 15:29:32,436 INFO L226 Difference]: Without dead ends: 127719 [2021-06-05 15:29:32,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6115 ImplicationChecksByTransitivity, 1301.9ms TimeCoverageRelationStatistics Valid=3011, Invalid=10795, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 15:29:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127719 states. [2021-06-05 15:29:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127719 to 39730. [2021-06-05 15:29:34,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39730 states, 39729 states have (on average 4.411387147927207) internal successors, (175260), 39729 states have internal predecessors, (175260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39730 states to 39730 states and 175260 transitions. [2021-06-05 15:29:34,458 INFO L78 Accepts]: Start accepts. Automaton has 39730 states and 175260 transitions. Word has length 43 [2021-06-05 15:29:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:34,458 INFO L482 AbstractCegarLoop]: Abstraction has 39730 states and 175260 transitions. [2021-06-05 15:29:34,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 39730 states and 175260 transitions. [2021-06-05 15:29:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:29:34,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:34,547 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:34,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:34,748 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:34,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1617681380, now seen corresponding path program 28 times [2021-06-05 15:29:34,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:34,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688209280] [2021-06-05 15:29:34,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 15:29:34,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688209280] [2021-06-05 15:29:34,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688209280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951138943] [2021-06-05 15:29:34,778 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 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 [2021-06-05 15:29:34,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:29:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 15:29:34,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951138943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:34,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:34,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 15:29:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858472934] [2021-06-05 15:29:34,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:29:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:29:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:29:34,878 INFO L87 Difference]: Start difference. First operand 39730 states and 175260 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:35,373 INFO L93 Difference]: Finished difference Result 67789 states and 281482 transitions. [2021-06-05 15:29:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:29:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:29:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:35,919 INFO L225 Difference]: With dead ends: 67789 [2021-06-05 15:29:35,919 INFO L226 Difference]: Without dead ends: 67789 [2021-06-05 15:29:35,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:29:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67789 states. [2021-06-05 15:29:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67789 to 42904. [2021-06-05 15:29:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42904 states, 42903 states have (on average 4.394098314803161) internal successors, (188520), 42903 states have internal predecessors, (188520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42904 states to 42904 states and 188520 transitions. [2021-06-05 15:29:37,258 INFO L78 Accepts]: Start accepts. Automaton has 42904 states and 188520 transitions. Word has length 45 [2021-06-05 15:29:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:37,258 INFO L482 AbstractCegarLoop]: Abstraction has 42904 states and 188520 transitions. [2021-06-05 15:29:37,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 42904 states and 188520 transitions. [2021-06-05 15:29:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:29:37,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:37,349 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:37,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:37,550 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1352044384, now seen corresponding path program 29 times [2021-06-05 15:29:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:37,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421132847] [2021-06-05 15:29:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-06-05 15:29:37,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421132847] [2021-06-05 15:29:37,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421132847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:37,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537755676] [2021-06-05 15:29:37,589 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 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 [2021-06-05 15:29:37,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:29:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:29:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:29:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537755676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:37,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:37,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 15:29:37,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489270359] [2021-06-05 15:29:37,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:29:37,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:37,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:29:37,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:29:37,735 INFO L87 Difference]: Start difference. First operand 42904 states and 188520 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:39,631 INFO L93 Difference]: Finished difference Result 115466 states and 489083 transitions. [2021-06-05 15:29:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:29:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:29:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:40,024 INFO L225 Difference]: With dead ends: 115466 [2021-06-05 15:29:40,025 INFO L226 Difference]: Without dead ends: 113950 [2021-06-05 15:29:40,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=1536, Invalid=5604, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:29:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113950 states. [2021-06-05 15:29:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113950 to 40933. [2021-06-05 15:29:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 4.4053796540603924) internal successors, (180321), 40932 states have internal predecessors, (180321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 180321 transitions. [2021-06-05 15:29:41,933 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 180321 transitions. Word has length 45 [2021-06-05 15:29:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:41,933 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 180321 transitions. [2021-06-05 15:29:41,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 180321 transitions. [2021-06-05 15:29:42,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:29:42,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:42,012 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:42,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 15:29:42,213 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1091018938, now seen corresponding path program 30 times [2021-06-05 15:29:42,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:42,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427461273] [2021-06-05 15:29:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 15:29:42,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:42,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427461273] [2021-06-05 15:29:42,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427461273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:42,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939672646] [2021-06-05 15:29:42,261 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 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 [2021-06-05 15:29:42,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:29:42,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:29:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:42,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 7 [2021-06-05 15:29:42,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:42,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:42,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:42,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:9 [2021-06-05 15:29:42,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:42,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:29:42,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:42,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:42,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:42,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-06-05 15:29:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 15:29:42,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939672646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 15:29:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969317890] [2021-06-05 15:29:42,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:29:42,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:42,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:29:42,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:29:42,528 INFO L87 Difference]: Start difference. First operand 40933 states and 180321 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:45,005 INFO L93 Difference]: Finished difference Result 77213 states and 327298 transitions. [2021-06-05 15:29:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:29:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:29:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:45,236 INFO L225 Difference]: With dead ends: 77213 [2021-06-05 15:29:45,236 INFO L226 Difference]: Without dead ends: 76984 [2021-06-05 15:29:45,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 1582.7ms TimeCoverageRelationStatistics Valid=1363, Invalid=5117, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:29:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76984 states. [2021-06-05 15:29:46,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76984 to 44638. [2021-06-05 15:29:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44638 states, 44637 states have (on average 4.39812263368954) internal successors, (196319), 44637 states have internal predecessors, (196319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44638 states to 44638 states and 196319 transitions. [2021-06-05 15:29:46,792 INFO L78 Accepts]: Start accepts. Automaton has 44638 states and 196319 transitions. Word has length 45 [2021-06-05 15:29:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:46,792 INFO L482 AbstractCegarLoop]: Abstraction has 44638 states and 196319 transitions. [2021-06-05 15:29:46,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44638 states and 196319 transitions. [2021-06-05 15:29:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:29:46,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:46,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:47,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:47,097 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash -218983474, now seen corresponding path program 31 times [2021-06-05 15:29:47,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:47,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520302502] [2021-06-05 15:29:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 15:29:47,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:47,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520302502] [2021-06-05 15:29:47,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520302502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:47,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148043838] [2021-06-05 15:29:47,352 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 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 [2021-06-05 15:29:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:29:47,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:47,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 15:29:47,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:47,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:47,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:59, output treesize:45 [2021-06-05 15:29:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-05 15:29:47,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-05 15:29:47,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:47,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:47,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:75, output treesize:45 [2021-06-05 15:29:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 28 [2021-06-05 15:29:47,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:47,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 26 [2021-06-05 15:29:47,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:47,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:47,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:29:47,842 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:39 [2021-06-05 15:29:48,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 15:29:48,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:29:48,111 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 15:29:48,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:48,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:48,123 INFO L628 ElimStorePlain]: treesize reduction 74, result has 6.3 percent of original size [2021-06-05 15:29:48,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-06-05 15:29:48,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:48,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:109, output treesize:5 [2021-06-05 15:29:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:29:48,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148043838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:48,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:48,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-05 15:29:48,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587362363] [2021-06-05 15:29:48,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:29:48,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:48,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:29:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:29:48,142 INFO L87 Difference]: Start difference. First operand 44638 states and 196319 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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) [2021-06-05 15:29:49,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:49,351 INFO L93 Difference]: Finished difference Result 57374 states and 249695 transitions. [2021-06-05 15:29:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:29:49,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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) Word has length 47 [2021-06-05 15:29:49,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:49,352 INFO L225 Difference]: With dead ends: 57374 [2021-06-05 15:29:49,352 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 15:29:49,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:29:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 15:29:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 15:29:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 15:29:49,353 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-06-05 15:29:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:49,353 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 15:29:49,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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) [2021-06-05 15:29:49,353 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 15:29:49,353 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 15:29:49,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:29:49,554 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:29:49,556 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:29:49 BasicIcfg [2021-06-05 15:29:49,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:29:49,557 INFO L168 Benchmark]: Toolchain (without parser) took 60713.04 ms. Allocated memory was 371.2 MB in the beginning and 13.8 GB in the end (delta: 13.4 GB). Free memory was 350.0 MB in the beginning and 10.2 GB in the end (delta: -9.8 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 371.2 MB. Free memory was 351.2 MB in the beginning and 351.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.73 ms. Allocated memory is still 371.2 MB. Free memory was 349.9 MB in the beginning and 348.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 INFO L168 Benchmark]: Boogie Preprocessor took 22.57 ms. Allocated memory is still 371.2 MB. Free memory was 348.4 MB in the beginning and 347.5 MB in the end (delta: 990.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 INFO L168 Benchmark]: RCFGBuilder took 288.74 ms. Allocated memory is still 371.2 MB. Free memory was 347.4 MB in the beginning and 333.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 INFO L168 Benchmark]: TraceAbstraction took 60372.78 ms. Allocated memory was 371.2 MB in the beginning and 13.8 GB in the end (delta: 13.4 GB). Free memory was 333.3 MB in the beginning and 10.2 GB in the end (delta: -9.9 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-06-05 15:29:49,557 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 0.10 ms. Allocated memory is still 371.2 MB. Free memory was 351.2 MB in the beginning and 351.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.73 ms. Allocated memory is still 371.2 MB. Free memory was 349.9 MB in the beginning and 348.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.57 ms. Allocated memory is still 371.2 MB. Free memory was 348.4 MB in the beginning and 347.5 MB in the end (delta: 990.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 288.74 ms. Allocated memory is still 371.2 MB. Free memory was 347.4 MB in the beginning and 333.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 60372.78 ms. Allocated memory was 371.2 MB in the beginning and 13.8 GB in the end (delta: 13.4 GB). Free memory was 333.3 MB in the beginning and 10.2 GB in the end (delta: -9.9 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 77]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 60267.8ms, OverallIterations: 41, TraceHistogramMax: 4, EmptinessCheckTime: 1289.8ms, AutomataDifference: 25779.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2342 SDtfs, 11715 SDslu, 13720 SDs, 0 SdLazy, 12344 SolverSat, 1844 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5828.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2258 GetRequests, 1229 SyntacticMatches, 29 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18809 ImplicationChecksByTransitivity, 11171.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44638occurred in iteration=40, InterpolantAutomatonStates: 957, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16181.3ms AutomataMinimizationTime, 41 MinimizatonAttempts, 355813 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 215.2ms SsaConstructionTime, 672.0ms SatisfiabilityAnalysisTime, 7449.0ms InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2696 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2628 ConstructedInterpolants, 4 QuantifiedInterpolants, 13598 SizeOfPredicates, 80 NumberOfNonLiveVariables, 3451 ConjunctsInSsa, 392 ConjunctsInUnsatCore, 75 InterpolantComputations, 7 PerfectInterpolantSequences, 778/1413 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...