/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:35:29,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:35:29,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:35:29,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:35:29,766 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 15:35:29,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:35:29,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:35:29,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:35:29,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:35:29,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:35:29,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:35:29,797 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:35:29,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:35:29,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:35:29,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:35:29,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:35:29,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:35:29,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:35:29,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:35:29,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:35:29,800 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:35:29,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:35:29,800 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:35:29,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:35:30,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:35:30,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:35:30,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:35:30,073 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:35:30,074 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:35:30,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-06-05 15:35:30,074 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-06-05 15:35:30,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:35:30,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:35:30,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:35:30,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:35:30,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:35:30,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:35:30,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:35:30,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:35:30,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:35:30,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/1) ... [2021-06-05 15:35:30,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:35:30,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:35:30,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:35:30,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:35:30,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (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 15:35:30,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:35:30,230 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:35:30,230 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:35:30,230 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:35:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:35:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:35:30,231 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:35:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:35:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:35:30,231 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:35:30,231 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:35:30,231 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:35:30,232 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:35:30,232 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:35:30,232 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:35:30,232 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 15:35:30,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:35:30,395 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:35:30,396 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:35:30 BoogieIcfgContainer [2021-06-05 15:35:30,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:35:30,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:35:30,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:35:30,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:35:30,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:35:30" (1/2) ... [2021-06-05 15:35:30,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3143f29e and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:35:30, skipping insertion in model container [2021-06-05 15:35:30,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:35:30" (2/2) ... [2021-06-05 15:35:30,401 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-06-05 15:35:30,404 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:35:30,405 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:35:30,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:35:30,405 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:35:30,445 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:35:30,458 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:35:30,469 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:35:30,470 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:35:30,470 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:35:30,470 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:35:30,470 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:35:30,470 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:35:30,470 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:35:30,470 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:35:30,476 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-06-05 15:35:30,569 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 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 15:35:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 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 15:35:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:35:30,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:30,595 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] [2021-06-05 15:35:30,595 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1590059923, now seen corresponding path program 1 times [2021-06-05 15:35:30,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:30,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952335310] [2021-06-05 15:35:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:30,687 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 15:35:30,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952335310] [2021-06-05 15:35:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952335310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:30,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:30,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:35:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945039597] [2021-06-05 15:35:30,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:35:30,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:30,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:35:30,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:30,712 INFO L87 Difference]: Start difference. First operand has 755 states, 753 states have (on average 3.634794156706507) internal successors, (2737), 754 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:30,775 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-06-05 15:35:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:35:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:35:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:30,794 INFO L225 Difference]: With dead ends: 912 [2021-06-05 15:35:30,795 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 15:35:30,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 15:35:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-06-05 15:35:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 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 15:35:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-06-05 15:35:30,870 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-06-05 15:35:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:30,873 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-06-05 15:35:30,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-06-05 15:35:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:35:30,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:30,876 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] [2021-06-05 15:35:30,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:35:30,877 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:30,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2041716967, now seen corresponding path program 2 times [2021-06-05 15:35:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:30,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198670583] [2021-06-05 15:35:30,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:30,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:30,958 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 15:35:30,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:30,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198670583] [2021-06-05 15:35:30,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198670583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:30,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:30,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:35:30,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342935683] [2021-06-05 15:35:30,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:35:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:35:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:30,961 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:31,034 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-06-05 15:35:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:35:31,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:35:31,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:31,038 INFO L225 Difference]: With dead ends: 863 [2021-06-05 15:35:31,038 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 15:35:31,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:35:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 15:35:31,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-06-05 15:35:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 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 15:35:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-06-05 15:35:31,062 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-06-05 15:35:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:31,062 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-06-05 15:35:31,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-06-05 15:35:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:35:31,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:31,066 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] [2021-06-05 15:35:31,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:35:31,066 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:31,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1345429901, now seen corresponding path program 1 times [2021-06-05 15:35:31,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:31,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35605041] [2021-06-05 15:35:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:31,116 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 15:35:31,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35605041] [2021-06-05 15:35:31,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35605041] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:31,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:31,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:35:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863480132] [2021-06-05 15:35:31,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:35:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:35:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:31,120 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:31,131 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-06-05 15:35:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:35:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:35:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:31,137 INFO L225 Difference]: With dead ends: 752 [2021-06-05 15:35:31,140 INFO L226 Difference]: Without dead ends: 752 [2021-06-05 15:35:31,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-06-05 15:35:31,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-06-05 15:35:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 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 15:35:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-06-05 15:35:31,158 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-06-05 15:35:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:31,159 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-06-05 15:35:31,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-06-05 15:35:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:35:31,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:31,161 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, 1, 1] [2021-06-05 15:35:31,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:35:31,161 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash -919240208, now seen corresponding path program 1 times [2021-06-05 15:35:31,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:31,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301845475] [2021-06-05 15:35:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:31,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:31,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301845475] [2021-06-05 15:35:31,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301845475] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:31,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:35:31,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:35:31,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257805139] [2021-06-05 15:35:31,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:35:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:35:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:31,192 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:31,201 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-06-05 15:35:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:35:31,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:35:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:31,205 INFO L225 Difference]: With dead ends: 800 [2021-06-05 15:35:31,206 INFO L226 Difference]: Without dead ends: 774 [2021-06-05 15:35:31,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:35:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-05 15:35:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-06-05 15:35:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 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 15:35:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-06-05 15:35:31,222 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-06-05 15:35:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:31,222 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-06-05 15:35:31,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-06-05 15:35:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:35:31,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:31,225 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, 1, 1, 1, 1, 1] [2021-06-05 15:35:31,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:35:31,225 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -308585039, now seen corresponding path program 1 times [2021-06-05 15:35:31,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:31,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521035749] [2021-06-05 15:35:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:31,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:31,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521035749] [2021-06-05 15:35:31,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521035749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:31,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460945589] [2021-06-05 15:35:31,422 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 15:35:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:35:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:31,728 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 15:35:31,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:31,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:31,737 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 15:35:31,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:35:31,789 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 15:35:31,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:31,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:31,799 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 15:35:31,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 15:35:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460945589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:31,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:31,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:35:31,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156084527] [2021-06-05 15:35:31,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:35:31,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:35:31,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:35:31,881 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 15:35:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:32,332 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-06-05 15:35:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:35:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 34 [2021-06-05 15:35:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:32,337 INFO L225 Difference]: With dead ends: 1455 [2021-06-05 15:35:32,337 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 15:35:32,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:35:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 15:35:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-06-05 15:35:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 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 15:35:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-06-05 15:35:32,362 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-06-05 15:35:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:32,362 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-06-05 15:35:32,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 15:35:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-06-05 15:35:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:35:32,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:32,365 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:32,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:32,583 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:32,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1659336041, now seen corresponding path program 2 times [2021-06-05 15:35:32,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:32,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636948446] [2021-06-05 15:35:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:32,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636948446] [2021-06-05 15:35:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636948446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467325663] [2021-06-05 15:35:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:35:32,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:35:32,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:32,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:35:32,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:35:32,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467325663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:32,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:35:32,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 15:35:32,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572982429] [2021-06-05 15:35:32,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:35:32,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:35:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:32,774 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 15:35:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:32,790 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-06-05 15:35:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:35:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 37 [2021-06-05 15:35:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:32,799 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 15:35:32,799 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 15:35:32,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 15:35:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-06-05 15:35:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 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 15:35:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-06-05 15:35:32,846 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-06-05 15:35:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:32,846 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-06-05 15:35:32,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 15:35:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-06-05 15:35:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:35:32,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:32,850 INFO L521 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2021-06-05 15:35:33,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:33,066 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:33,067 INFO L82 PathProgramCache]: Analyzing trace with hash 480818054, now seen corresponding path program 3 times [2021-06-05 15:35:33,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:33,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081386361] [2021-06-05 15:35:33,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:35:33,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081386361] [2021-06-05 15:35:33,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081386361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528058410] [2021-06-05 15:35:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:35:33,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:35:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:33,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:35:33,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:35:33,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528058410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:35:33,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:35:33,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-06-05 15:35:33,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884728412] [2021-06-05 15:35:33,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:35:33,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:35:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:33,228 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:33,256 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-06-05 15:35:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:35:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:35:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:33,275 INFO L225 Difference]: With dead ends: 4845 [2021-06-05 15:35:33,276 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 15:35:33,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:35:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 15:35:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-06-05 15:35:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 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 15:35:33,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-06-05 15:35:33,376 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-06-05 15:35:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:33,376 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-06-05 15:35:33,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-06-05 15:35:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:35:33,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:33,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:35:33,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:33,605 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1559474053, now seen corresponding path program 4 times [2021-06-05 15:35:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:33,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851484539] [2021-06-05 15:35:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:35:34,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851484539] [2021-06-05 15:35:34,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851484539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:34,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532230839] [2021-06-05 15:35:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:35:34,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:35:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:34,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:34,516 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 31 treesize of output 19 [2021-06-05 15:35:34,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:34,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:34,526 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 15:35:34,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:35:34,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:34,596 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 25 treesize of output 13 [2021-06-05 15:35:34,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:34,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:34,605 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 15:35:34,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:34,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532230839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:34,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:34,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 15:35:34,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322251290] [2021-06-05 15:35:34,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:35:34,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:35:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:35:34,695 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 15:35:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:42,534 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-06-05 15:35:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-06-05 15:35:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 44 [2021-06-05 15:35:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:42,610 INFO L225 Difference]: With dead ends: 26830 [2021-06-05 15:35:42,611 INFO L226 Difference]: Without dead ends: 23098 [2021-06-05 15:35:42,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 6180.2ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-06-05 15:35:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-06-05 15:35:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-06-05 15:35:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-06-05 15:35:42,856 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-06-05 15:35:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:42,857 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-06-05 15:35:42,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 15:35:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-06-05 15:35:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:35:42,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:42,867 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:35:43,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:43,084 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:43,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:43,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1256079791, now seen corresponding path program 5 times [2021-06-05 15:35:43,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:43,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770701532] [2021-06-05 15:35:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:43,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770701532] [2021-06-05 15:35:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770701532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911258197] [2021-06-05 15:35:43,443 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 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 15:35:43,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:35:43,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:35:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:44,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:44,003 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 31 treesize of output 19 [2021-06-05 15:35:44,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:44,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:44,012 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 15:35:44,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:35:44,145 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:44,145 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 25 treesize of output 13 [2021-06-05 15:35:44,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:44,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:44,151 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 15:35:44,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:44,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911258197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:44,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:44,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:35:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77494871] [2021-06-05 15:35:44,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:35:44,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:44,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:35:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:35:44,244 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:35:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:48,074 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-06-05 15:35:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 15:35:48,074 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:35:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:48,145 INFO L225 Difference]: With dead ends: 28401 [2021-06-05 15:35:48,145 INFO L226 Difference]: Without dead ends: 27869 [2021-06-05 15:35:48,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 2858.8ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 15:35:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-06-05 15:35:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-06-05 15:35:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 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 15:35:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-06-05 15:35:48,401 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-06-05 15:35:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:48,401 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-06-05 15:35:48,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:35:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-06-05 15:35:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:35:48,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:48,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:35:48,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:35:48,625 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 748755985, now seen corresponding path program 6 times [2021-06-05 15:35:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063023243] [2021-06-05 15:35:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:49,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063023243] [2021-06-05 15:35:49,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063023243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090923589] [2021-06-05 15:35:49,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:35:49,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:35:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:35:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:49,364 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:49,364 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 29 treesize of output 17 [2021-06-05 15:35:49,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:49,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:49,373 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 15:35:49,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:35:49,512 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:49,512 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 25 treesize of output 13 [2021-06-05 15:35:49,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:49,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:49,525 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 15:35:49,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090923589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:49,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:35:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122188939] [2021-06-05 15:35:49,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:35:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:35:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:35:49,596 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:35:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:53,595 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-06-05 15:35:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 15:35:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:35:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:53,679 INFO L225 Difference]: With dead ends: 37756 [2021-06-05 15:35:53,679 INFO L226 Difference]: Without dead ends: 36886 [2021-06-05 15:35:53,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3167.9ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 15:35:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-06-05 15:35:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-06-05 15:35:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 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 15:35:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-06-05 15:35:53,978 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-06-05 15:35:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:53,979 INFO L482 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-06-05 15:35:53,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:35:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-06-05 15:35:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:35:53,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:53,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:35:54,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:54,206 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -169323025, now seen corresponding path program 7 times [2021-06-05 15:35:54,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:54,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908460623] [2021-06-05 15:35:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:54,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:54,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908460623] [2021-06-05 15:35:54,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908460623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:54,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783882070] [2021-06-05 15:35:54,567 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 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 15:35:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:54,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:35:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:35:54,980 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:54,981 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 29 treesize of output 17 [2021-06-05 15:35:54,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:54,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:54,990 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 15:35:54,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:35:55,120 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:35:55,120 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 25 treesize of output 13 [2021-06-05 15:35:55,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:35:55,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:35:55,125 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 15:35:55,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:35:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783882070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:55,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:35:55,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:35:55,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902982685] [2021-06-05 15:35:55,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:35:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:35:55,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:35:55,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:35:55,210 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:00,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:00,203 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-06-05 15:36:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 15:36:00,204 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:36:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:00,298 INFO L225 Difference]: With dead ends: 47050 [2021-06-05 15:36:00,298 INFO L226 Difference]: Without dead ends: 45439 [2021-06-05 15:36:00,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 3945.5ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 15:36:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-06-05 15:36:00,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-06-05 15:36:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 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 15:36:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-06-05 15:36:00,633 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-06-05 15:36:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:00,634 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-06-05 15:36:00,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-06-05 15:36:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:00,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:00,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:00,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:00,864 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash 137214661, now seen corresponding path program 8 times [2021-06-05 15:36:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:00,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663947630] [2021-06-05 15:36:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:01,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663947630] [2021-06-05 15:36:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663947630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:01,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758283565] [2021-06-05 15:36:01,162 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 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 15:36:01,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:01,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:01,529 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 31 treesize of output 19 [2021-06-05 15:36:01,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:01,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:01,545 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 15:36:01,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 15:36:01,638 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:01,638 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 25 treesize of output 13 [2021-06-05 15:36:01,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:01,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:01,646 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 15:36:01,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:01,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758283565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:01,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:01,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:01,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435096983] [2021-06-05 15:36:01,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:01,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:01,726 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:05,611 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-06-05 15:36:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:36:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:05,687 INFO L225 Difference]: With dead ends: 40863 [2021-06-05 15:36:05,687 INFO L226 Difference]: Without dead ends: 40043 [2021-06-05 15:36:05,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3024.6ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 15:36:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-06-05 15:36:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-06-05 15:36:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 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 15:36:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-06-05 15:36:05,974 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-06-05 15:36:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:05,974 INFO L482 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-06-05 15:36:05,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-06-05 15:36:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:05,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:05,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:06,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:36:06,201 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:06,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:06,201 INFO L82 PathProgramCache]: Analyzing trace with hash -780864349, now seen corresponding path program 9 times [2021-06-05 15:36:06,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:06,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997130458] [2021-06-05 15:36:06,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:06,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:06,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997130458] [2021-06-05 15:36:06,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997130458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:06,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017563438] [2021-06-05 15:36:06,505 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 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 15:36:06,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:36:06,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:06,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:06,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:06,848 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 31 treesize of output 19 [2021-06-05 15:36:06,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:06,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:06,884 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 15:36:06,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 15:36:07,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:07,025 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:36:07,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:07,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:07,033 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 15:36:07,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 15:36:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:07,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017563438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:07,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:07,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:07,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305950244] [2021-06-05 15:36:07,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:07,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:07,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:07,150 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:12,074 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-06-05 15:36:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 15:36:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:12,157 INFO L225 Difference]: With dead ends: 45280 [2021-06-05 15:36:12,157 INFO L226 Difference]: Without dead ends: 44360 [2021-06-05 15:36:12,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 3976.0ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 15:36:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-06-05 15:36:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-06-05 15:36:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 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 15:36:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-06-05 15:36:12,470 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-06-05 15:36:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:12,470 INFO L482 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-06-05 15:36:12,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:12,470 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-06-05 15:36:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:12,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:12,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:12,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:12,696 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash -114430541, now seen corresponding path program 10 times [2021-06-05 15:36:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904431512] [2021-06-05 15:36:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:13,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:13,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904431512] [2021-06-05 15:36:13,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904431512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:13,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650759751] [2021-06-05 15:36:13,027 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 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 15:36:13,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:36:13,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:13,425 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:13,426 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 31 treesize of output 19 [2021-06-05 15:36:13,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:13,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:13,436 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 15:36:13,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:36:13,499 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:13,500 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 25 treesize of output 13 [2021-06-05 15:36:13,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:13,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:13,505 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 15:36:13,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650759751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:13,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:13,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:13,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53110120] [2021-06-05 15:36:13,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:13,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:13,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:13,577 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:19,244 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-06-05 15:36:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 15:36:19,245 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:36:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:19,321 INFO L225 Difference]: With dead ends: 40459 [2021-06-05 15:36:19,321 INFO L226 Difference]: Without dead ends: 39249 [2021-06-05 15:36:19,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4524.3ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 15:36:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-06-05 15:36:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-06-05 15:36:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 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 15:36:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-06-05 15:36:19,602 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-06-05 15:36:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:19,603 INFO L482 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-06-05 15:36:19,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-06-05 15:36:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:19,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:19,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:19,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:36:19,814 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash -686560397, now seen corresponding path program 11 times [2021-06-05 15:36:19,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:19,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790428976] [2021-06-05 15:36:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:20,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:20,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790428976] [2021-06-05 15:36:20,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790428976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:20,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215473624] [2021-06-05 15:36:20,055 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 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 15:36:20,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:36:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:36:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:20,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:20,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:36:20,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:20,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:20,404 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 15:36:20,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 15:36:20,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:20,563 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 25 treesize of output 13 [2021-06-05 15:36:20,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:20,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:20,568 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 15:36:20,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:20,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215473624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:20,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:20,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:20,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30975905] [2021-06-05 15:36:20,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:20,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:20,645 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:24,136 INFO L93 Difference]: Finished difference Result 22347 states and 74432 transitions. [2021-06-05 15:36:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:36:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:24,176 INFO L225 Difference]: With dead ends: 22347 [2021-06-05 15:36:24,176 INFO L226 Difference]: Without dead ends: 22075 [2021-06-05 15:36:24,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2265.0ms TimeCoverageRelationStatistics Valid=1403, Invalid=7339, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:36:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2021-06-05 15:36:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 6570. [2021-06-05 15:36:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 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 15:36:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-06-05 15:36:24,347 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-06-05 15:36:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:24,348 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-06-05 15:36:24,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-06-05 15:36:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:24,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:24,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:24,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:36:24,560 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 263509385, now seen corresponding path program 12 times [2021-06-05 15:36:24,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:24,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818923990] [2021-06-05 15:36:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:24,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:24,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818923990] [2021-06-05 15:36:24,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818923990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:24,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96348110] [2021-06-05 15:36:24,811 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 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 15:36:24,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:36:24,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:36:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:25,100 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:25,100 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 29 treesize of output 17 [2021-06-05 15:36:25,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:25,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:25,109 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 15:36:25,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:36:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:25,277 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:36:25,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:25,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:25,287 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 15:36:25,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 15:36:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:25,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96348110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:25,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:25,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:25,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670736183] [2021-06-05 15:36:25,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:25,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:25,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:25,356 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:27,814 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-06-05 15:36:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:36:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:27,839 INFO L225 Difference]: With dead ends: 13093 [2021-06-05 15:36:27,839 INFO L226 Difference]: Without dead ends: 12613 [2021-06-05 15:36:27,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1830.6ms TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:36:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-06-05 15:36:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-06-05 15:36:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 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 15:36:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-06-05 15:36:27,962 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-06-05 15:36:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:27,962 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-06-05 15:36:27,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-06-05 15:36:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:27,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:27,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:28,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:28,173 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:28,174 INFO L82 PathProgramCache]: Analyzing trace with hash -243814421, now seen corresponding path program 13 times [2021-06-05 15:36:28,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:28,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602396597] [2021-06-05 15:36:28,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:28,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:28,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602396597] [2021-06-05 15:36:28,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602396597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:28,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121046881] [2021-06-05 15:36:28,415 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 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 15:36:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:28,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:28,732 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:28,732 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 29 treesize of output 17 [2021-06-05 15:36:28,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:28,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:28,740 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 15:36:28,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:36:28,888 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:28,888 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 25 treesize of output 13 [2021-06-05 15:36:28,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:28,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:28,894 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 15:36:28,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:28,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121046881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:28,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:28,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:28,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456305076] [2021-06-05 15:36:28,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:28,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:28,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:28,963 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:30,602 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-06-05 15:36:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:36:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:36:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:30,624 INFO L225 Difference]: With dead ends: 12931 [2021-06-05 15:36:30,624 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 15:36:30,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1349.7ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:36:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 15:36:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-06-05 15:36:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 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 15:36:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-06-05 15:36:30,744 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-06-05 15:36:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:30,744 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-06-05 15:36:30,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-06-05 15:36:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:30,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:30,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:30,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:36:30,953 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:30,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:30,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1161893431, now seen corresponding path program 14 times [2021-06-05 15:36:30,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:30,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897022030] [2021-06-05 15:36:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:31,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897022030] [2021-06-05 15:36:31,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897022030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:31,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226598017] [2021-06-05 15:36:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:36:31,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:36:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:31,520 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:31,520 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 29 treesize of output 17 [2021-06-05 15:36:31,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:31,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:31,528 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 15:36:31,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:36:31,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:31,665 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 25 treesize of output 13 [2021-06-05 15:36:31,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:31,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:31,670 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 15:36:31,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:31,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226598017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:31,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:31,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:31,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389916988] [2021-06-05 15:36:31,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:31,736 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:35,854 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-06-05 15:36:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:36:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:35,914 INFO L225 Difference]: With dead ends: 31575 [2021-06-05 15:36:35,914 INFO L226 Difference]: Without dead ends: 31013 [2021-06-05 15:36:35,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 3043.6ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:36:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-06-05 15:36:36,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-06-05 15:36:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 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 15:36:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-06-05 15:36:36,147 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-06-05 15:36:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:36,147 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-06-05 15:36:36,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-06-05 15:36:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:36,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:36,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:36,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:36,357 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1107000947, now seen corresponding path program 15 times [2021-06-05 15:36:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:36,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092722737] [2021-06-05 15:36:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092722737] [2021-06-05 15:36:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092722737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090461836] [2021-06-05 15:36:36,593 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 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 15:36:36,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:36:36,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:36:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:37,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:36:37,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:36:37,045 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:36:37,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:37,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:37,057 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 15:36:37,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-06-05 15:36:37,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:37,132 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 25 treesize of output 13 [2021-06-05 15:36:37,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:37,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:37,138 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 15:36:37,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090461836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:37,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:37,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:37,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739356775] [2021-06-05 15:36:37,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:37,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:37,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:37,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:37,220 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:42,889 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-06-05 15:36:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 15:36:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:42,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:42,953 INFO L225 Difference]: With dead ends: 35083 [2021-06-05 15:36:42,954 INFO L226 Difference]: Without dead ends: 34089 [2021-06-05 15:36:42,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 4267.3ms TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-06-05 15:36:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-06-05 15:36:43,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-06-05 15:36:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 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 15:36:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-06-05 15:36:43,247 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-06-05 15:36:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:43,247 INFO L482 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-06-05 15:36:43,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-06-05 15:36:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:43,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:43,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:43,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:36:43,465 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:43,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545757, now seen corresponding path program 16 times [2021-06-05 15:36:43,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:43,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488631207] [2021-06-05 15:36:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:43,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:43,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488631207] [2021-06-05 15:36:43,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488631207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:43,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550931949] [2021-06-05 15:36:43,796 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 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 15:36:43,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:36:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:44,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:44,185 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 31 treesize of output 19 [2021-06-05 15:36:44,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:44,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:44,193 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 15:36:44,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:36:44,255 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:44,255 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 25 treesize of output 13 [2021-06-05 15:36:44,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:44,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:44,260 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 15:36:44,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:44,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550931949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:44,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:44,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:44,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398581153] [2021-06-05 15:36:44,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:44,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:44,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:44,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:44,327 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:50,432 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-06-05 15:36:50,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 15:36:50,433 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:36:50,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:50,515 INFO L225 Difference]: With dead ends: 41800 [2021-06-05 15:36:50,516 INFO L226 Difference]: Without dead ends: 37404 [2021-06-05 15:36:50,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 4696.3ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 15:36:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-06-05 15:36:50,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-06-05 15:36:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 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 15:36:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-06-05 15:36:50,819 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-06-05 15:36:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:50,819 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-06-05 15:36:50,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:36:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-06-05 15:36:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:50,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:50,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:51,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:36:51,030 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:51,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:51,030 INFO L82 PathProgramCache]: Analyzing trace with hash -789276919, now seen corresponding path program 17 times [2021-06-05 15:36:51,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:51,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372334613] [2021-06-05 15:36:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:51,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372334613] [2021-06-05 15:36:51,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372334613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608232237] [2021-06-05 15:36:51,309 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 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 15:36:51,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:36:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 15:36:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:51,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:51,605 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 31 treesize of output 19 [2021-06-05 15:36:51,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:51,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:51,612 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 15:36:51,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:36:51,741 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:51,741 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 25 treesize of output 13 [2021-06-05 15:36:51,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:51,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:51,749 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 15:36:51,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608232237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:51,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:51,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:51,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651646893] [2021-06-05 15:36:51,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:51,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:51,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:51,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:51,827 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:36:55,533 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-06-05 15:36:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 15:36:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:36:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:36:55,595 INFO L225 Difference]: With dead ends: 33537 [2021-06-05 15:36:55,596 INFO L226 Difference]: Without dead ends: 33005 [2021-06-05 15:36:55,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2625.9ms TimeCoverageRelationStatistics Valid=2279, Invalid=12483, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 15:36:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-06-05 15:36:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-06-05 15:36:55,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 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 15:36:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-06-05 15:36:55,855 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-06-05 15:36:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:36:55,855 INFO L482 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-06-05 15:36:55,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:36:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-06-05 15:36:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:36:55,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:36:55,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:36:56,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 15:36:56,072 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:36:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:36:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1296600725, now seen corresponding path program 18 times [2021-06-05 15:36:56,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:36:56,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620072025] [2021-06-05 15:36:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:36:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:36:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:56,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:36:56,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620072025] [2021-06-05 15:36:56,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620072025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:56,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464832977] [2021-06-05 15:36:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:36:56,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:36:56,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:36:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:36:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:36:56,653 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:56,654 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 29 treesize of output 17 [2021-06-05 15:36:56,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:56,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:56,661 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 15:36:56,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:36:56,781 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:36:56,782 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 25 treesize of output 13 [2021-06-05 15:36:56,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:36:56,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:36:56,786 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 15:36:56,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:36:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:36:56,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464832977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:36:56,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:36:56,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:36:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883914578] [2021-06-05 15:36:56,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:36:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:36:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:36:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:36:56,854 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:01,297 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-06-05 15:37:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 15:37:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:01,374 INFO L225 Difference]: With dead ends: 42883 [2021-06-05 15:37:01,374 INFO L226 Difference]: Without dead ends: 41993 [2021-06-05 15:37:01,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3384.3ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 15:37:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-06-05 15:37:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-06-05 15:37:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 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 15:37:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-06-05 15:37:01,682 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-06-05 15:37:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:01,682 INFO L482 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-06-05 15:37:01,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-06-05 15:37:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:01,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:01,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 15:37:01,894 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:01,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2080287561, now seen corresponding path program 19 times [2021-06-05 15:37:01,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:01,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52829035] [2021-06-05 15:37:01,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52829035] [2021-06-05 15:37:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52829035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417344462] [2021-06-05 15:37:02,203 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 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 15:37:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:02,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:02,492 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:02,493 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 29 treesize of output 17 [2021-06-05 15:37:02,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:02,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:02,500 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 15:37:02,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:37:02,615 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:02,615 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 25 treesize of output 13 [2021-06-05 15:37:02,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:02,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:02,620 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 15:37:02,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417344462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:02,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:02,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241989869] [2021-06-05 15:37:02,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:02,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:02,683 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:07,614 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-05 15:37:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:08,253 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-06-05 15:37:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-06-05 15:37:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:37:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:08,349 INFO L225 Difference]: With dead ends: 48973 [2021-06-05 15:37:08,349 INFO L226 Difference]: Without dead ends: 47923 [2021-06-05 15:37:08,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4319.1ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 15:37:08,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-06-05 15:37:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-06-05 15:37:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 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 15:37:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-06-05 15:37:08,720 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-06-05 15:37:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:08,720 INFO L482 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-06-05 15:37:08,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-06-05 15:37:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:08,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:08,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:08,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:08,949 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1908142049, now seen corresponding path program 20 times [2021-06-05 15:37:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:08,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164935406] [2021-06-05 15:37:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:09,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164935406] [2021-06-05 15:37:09,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164935406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:09,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140797930] [2021-06-05 15:37:09,227 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 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 15:37:09,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:37:09,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:09,567 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:09,568 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 31 treesize of output 19 [2021-06-05 15:37:09,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:09,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:09,576 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 15:37:09,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 15:37:09,717 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:09,717 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 25 treesize of output 13 [2021-06-05 15:37:09,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:09,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:09,722 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 15:37:09,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:09,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140797930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:09,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:09,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:09,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509759081] [2021-06-05 15:37:09,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:09,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:09,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:09,801 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:14,392 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-06-05 15:37:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 15:37:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:14,480 INFO L225 Difference]: With dead ends: 45204 [2021-06-05 15:37:14,480 INFO L226 Difference]: Without dead ends: 44384 [2021-06-05 15:37:14,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3389.4ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-06-05 15:37:14,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-06-05 15:37:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-06-05 15:37:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 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 15:37:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-06-05 15:37:14,843 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-06-05 15:37:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:14,843 INFO L482 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-06-05 15:37:14,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-06-05 15:37:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:14,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:14,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:15,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:37:15,056 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1468746237, now seen corresponding path program 21 times [2021-06-05 15:37:15,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:15,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068515466] [2021-06-05 15:37:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:15,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068515466] [2021-06-05 15:37:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068515466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:15,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051217119] [2021-06-05 15:37:15,378 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 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 15:37:15,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:37:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:15,703 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:15,703 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 31 treesize of output 19 [2021-06-05 15:37:15,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:15,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:15,713 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 15:37:15,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-06-05 15:37:15,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:15,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:15,826 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:37:15,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:15,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:15,834 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 15:37:15,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-06-05 15:37:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:15,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051217119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:15,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:15,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:15,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669914232] [2021-06-05 15:37:15,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:15,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:15,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:15,896 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:21,411 INFO L93 Difference]: Finished difference Result 49923 states and 165734 transitions. [2021-06-05 15:37:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 15:37:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:21,503 INFO L225 Difference]: With dead ends: 49923 [2021-06-05 15:37:21,504 INFO L226 Difference]: Without dead ends: 49003 [2021-06-05 15:37:21,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4334.6ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-06-05 15:37:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49003 states. [2021-06-05 15:37:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49003 to 9032. [2021-06-05 15:37:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 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 15:37:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-06-05 15:37:21,862 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-06-05 15:37:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:21,862 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-06-05 15:37:21,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-06-05 15:37:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:21,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:21,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:22,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:22,074 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:22,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2135180045, now seen corresponding path program 22 times [2021-06-05 15:37:22,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:22,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411191876] [2021-06-05 15:37:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:22,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411191876] [2021-06-05 15:37:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411191876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:22,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392243126] [2021-06-05 15:37:22,378 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 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 15:37:22,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:37:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:22,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:22,738 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 31 treesize of output 19 [2021-06-05 15:37:22,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:22,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:22,746 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 15:37:22,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:37:22,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:22,809 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 25 treesize of output 13 [2021-06-05 15:37:22,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:22,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:22,814 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 15:37:22,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:22,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392243126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:22,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:22,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:22,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935126622] [2021-06-05 15:37:22,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:22,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:22,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:22,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:22,892 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:29,128 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-06-05 15:37:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-06-05 15:37:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:37:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:29,209 INFO L225 Difference]: With dead ends: 45046 [2021-06-05 15:37:29,209 INFO L226 Difference]: Without dead ends: 43836 [2021-06-05 15:37:29,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 4695.1ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-06-05 15:37:29,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-06-05 15:37:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-06-05 15:37:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 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 15:37:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-06-05 15:37:29,548 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-06-05 15:37:29,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:29,549 INFO L482 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-06-05 15:37:29,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-06-05 15:37:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:29,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:29,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:29,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:29,760 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:29,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1563050189, now seen corresponding path program 23 times [2021-06-05 15:37:29,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:29,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051149744] [2021-06-05 15:37:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:29,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051149744] [2021-06-05 15:37:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051149744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659843165] [2021-06-05 15:37:29,998 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 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 15:37:30,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:37:30,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:37:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:37:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:37:30,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:37:30,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:30,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:30,351 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 15:37:30,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-06-05 15:37:30,472 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:30,472 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 25 treesize of output 13 [2021-06-05 15:37:30,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:30,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:30,477 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 15:37:30,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:30,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659843165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:30,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:30,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:30,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073517601] [2021-06-05 15:37:30,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:30,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:30,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:30,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:30,541 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:33,800 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-06-05 15:37:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:37:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:33,839 INFO L225 Difference]: With dead ends: 23013 [2021-06-05 15:37:33,839 INFO L226 Difference]: Without dead ends: 22741 [2021-06-05 15:37:33,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2040.6ms TimeCoverageRelationStatistics Valid=1189, Invalid=6121, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:37:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-06-05 15:37:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-06-05 15:37:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 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 15:37:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-06-05 15:37:34,039 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-06-05 15:37:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:34,040 INFO L482 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-06-05 15:37:34,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-06-05 15:37:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:34,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:34,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:34,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:37:34,251 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1134360447, now seen corresponding path program 24 times [2021-06-05 15:37:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371386200] [2021-06-05 15:37:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:37:34,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:34,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371386200] [2021-06-05 15:37:34,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371386200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033813314] [2021-06-05 15:37:34,611 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 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 15:37:34,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:37:34,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:34,959 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:34,959 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 31 treesize of output 19 [2021-06-05 15:37:34,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:34,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:34,967 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 15:37:34,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:37:35,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:35,027 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 25 treesize of output 13 [2021-06-05 15:37:35,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:35,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:35,033 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 15:37:35,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:35,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033813314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:35,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:35,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 15:37:35,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3417006] [2021-06-05 15:37:35,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:37:35,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:37:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:37:35,102 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:37:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:41,386 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-06-05 15:37:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-06-05 15:37:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:37:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:41,450 INFO L225 Difference]: With dead ends: 35903 [2021-06-05 15:37:41,450 INFO L226 Difference]: Without dead ends: 31668 [2021-06-05 15:37:41,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 4905.5ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:37:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-06-05 15:37:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-06-05 15:37:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 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 15:37:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-06-05 15:37:41,771 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-06-05 15:37:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:41,771 INFO L482 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-06-05 15:37:41,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:37:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-06-05 15:37:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:41,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:41,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:41,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:41,983 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash -345053005, now seen corresponding path program 25 times [2021-06-05 15:37:41,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:41,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858214642] [2021-06-05 15:37:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:42,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:42,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858214642] [2021-06-05 15:37:42,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858214642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:42,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158707745] [2021-06-05 15:37:42,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:37:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:42,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:42,575 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:42,575 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 31 treesize of output 19 [2021-06-05 15:37:42,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:42,582 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 15:37:42,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:37:42,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:42,699 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 25 treesize of output 13 [2021-06-05 15:37:42,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:42,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:42,704 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 15:37:42,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:42,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158707745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:42,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:42,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:42,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308969254] [2021-06-05 15:37:42,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:42,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:42,765 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:46,739 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-06-05 15:37:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 15:37:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:37:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:46,811 INFO L225 Difference]: With dead ends: 36007 [2021-06-05 15:37:46,811 INFO L226 Difference]: Without dead ends: 35475 [2021-06-05 15:37:46,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 2980.0ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 15:37:46,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-06-05 15:37:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-06-05 15:37:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 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 15:37:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-06-05 15:37:47,118 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-06-05 15:37:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:47,118 INFO L482 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-06-05 15:37:47,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:37:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-06-05 15:37:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:47,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:47,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:47,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 15:37:47,330 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:47,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:47,330 INFO L82 PathProgramCache]: Analyzing trace with hash -852376811, now seen corresponding path program 26 times [2021-06-05 15:37:47,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:47,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709719847] [2021-06-05 15:37:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:47,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709719847] [2021-06-05 15:37:47,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709719847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:47,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167655325] [2021-06-05 15:37:47,612 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 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 15:37:47,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:37:47,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:47,912 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:47,912 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 31 treesize of output 19 [2021-06-05 15:37:47,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:47,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:47,921 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 15:37:47,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:37:48,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:48,048 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 25 treesize of output 13 [2021-06-05 15:37:48,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:48,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:48,052 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 15:37:48,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:48,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167655325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:48,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:48,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:48,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200166597] [2021-06-05 15:37:48,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:48,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:48,120 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:52,189 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-06-05 15:37:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 15:37:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:52,253 INFO L225 Difference]: With dead ends: 34504 [2021-06-05 15:37:52,253 INFO L226 Difference]: Without dead ends: 34104 [2021-06-05 15:37:52,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3089.1ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:37:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-06-05 15:37:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-06-05 15:37:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 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 15:37:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-06-05 15:37:52,580 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-06-05 15:37:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:52,580 INFO L482 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-06-05 15:37:52,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-06-05 15:37:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:52,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:52,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:52,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:37:52,792 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1770455821, now seen corresponding path program 27 times [2021-06-05 15:37:52,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:52,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623827374] [2021-06-05 15:37:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:53,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623827374] [2021-06-05 15:37:53,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623827374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590007681] [2021-06-05 15:37:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:37:53,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:37:53,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:53,416 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:53,417 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 31 treesize of output 19 [2021-06-05 15:37:53,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:53,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:53,424 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 15:37:53,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 15:37:53,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:53,544 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 25 treesize of output 13 [2021-06-05 15:37:53,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:53,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:53,549 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 15:37:53,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:53,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590007681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:53,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:53,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926403549] [2021-06-05 15:37:53,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:53,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:53,615 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:37:58,539 INFO L93 Difference]: Finished difference Result 36651 states and 121809 transitions. [2021-06-05 15:37:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 15:37:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:37:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:37:58,611 INFO L225 Difference]: With dead ends: 36651 [2021-06-05 15:37:58,611 INFO L226 Difference]: Without dead ends: 36236 [2021-06-05 15:37:58,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 3874.7ms TimeCoverageRelationStatistics Valid=2681, Invalid=15141, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 15:37:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2021-06-05 15:37:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 9180. [2021-06-05 15:37:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 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 15:37:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 15:37:58,926 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 15:37:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:37:58,926 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 15:37:58,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:37:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 15:37:58,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:37:58,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:37:58,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:37:59,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:37:59,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:37:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:37:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1463918135, now seen corresponding path program 28 times [2021-06-05 15:37:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:37:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133068576] [2021-06-05 15:37:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:37:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:37:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:59,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:37:59,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133068576] [2021-06-05 15:37:59,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133068576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:59,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354348269] [2021-06-05 15:37:59,458 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 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 15:37:59,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:37:59,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:37:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:37:59,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:37:59,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:59,780 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 31 treesize of output 19 [2021-06-05 15:37:59,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:59,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:59,788 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 15:37:59,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-06-05 15:37:59,883 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:37:59,883 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 25 treesize of output 13 [2021-06-05 15:37:59,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:37:59,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:37:59,888 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 15:37:59,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:37:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:37:59,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354348269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:37:59,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:37:59,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:37:59,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092360299] [2021-06-05 15:37:59,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:37:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:37:59,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:37:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:37:59,948 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:38:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:03,761 INFO L93 Difference]: Finished difference Result 34096 states and 113371 transitions. [2021-06-05 15:38:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 15:38:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:38:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:03,822 INFO L225 Difference]: With dead ends: 34096 [2021-06-05 15:38:03,822 INFO L226 Difference]: Without dead ends: 33696 [2021-06-05 15:38:03,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 2906.6ms TimeCoverageRelationStatistics Valid=1870, Invalid=10340, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:38:03,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33696 states. [2021-06-05 15:38:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33696 to 9279. [2021-06-05 15:38:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.3040525975425736) internal successors, (30655), 9278 states have internal predecessors, (30655), 0 states have call successors, (0), 0 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 15:38:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30655 transitions. [2021-06-05 15:38:04,094 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30655 transitions. Word has length 44 [2021-06-05 15:38:04,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:04,094 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 30655 transitions. [2021-06-05 15:38:04,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 15:38:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30655 transitions. [2021-06-05 15:38:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:38:04,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:04,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:38:04,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:04,306 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1912970151, now seen corresponding path program 29 times [2021-06-05 15:38:04,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:04,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107991616] [2021-06-05 15:38:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:04,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:04,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107991616] [2021-06-05 15:38:04,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107991616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:04,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895887217] [2021-06-05 15:38:04,613 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 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 15:38:04,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:38:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:38:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:38:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:38:04,968 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:38:04,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:04,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:04,980 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 15:38:04,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:27 [2021-06-05 15:38:05,071 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:05,071 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 25 treesize of output 13 [2021-06-05 15:38:05,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:05,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:05,075 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 15:38:05,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:05,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:05,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895887217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:05,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:05,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:38:05,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132609667] [2021-06-05 15:38:05,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:38:05,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:05,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:38:05,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:38:05,139 INFO L87 Difference]: Start difference. First operand 9279 states and 30655 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:38:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:09,956 INFO L93 Difference]: Finished difference Result 35956 states and 119480 transitions. [2021-06-05 15:38:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:38:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:38:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:10,023 INFO L225 Difference]: With dead ends: 35956 [2021-06-05 15:38:10,023 INFO L226 Difference]: Without dead ends: 35541 [2021-06-05 15:38:10,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 3557.1ms TimeCoverageRelationStatistics Valid=2393, Invalid=13863, Unknown=0, NotChecked=0, Total=16256 [2021-06-05 15:38:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35541 states. [2021-06-05 15:38:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35541 to 9180. [2021-06-05 15:38:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 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 15:38:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-06-05 15:38:10,349 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-06-05 15:38:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:10,349 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-06-05 15:38:10,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:38:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-06-05 15:38:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:38:10,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:10,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:38:10,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 15:38:10,561 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1715563337, now seen corresponding path program 30 times [2021-06-05 15:38:10,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:10,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270023360] [2021-06-05 15:38:10,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:10,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:10,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270023360] [2021-06-05 15:38:10,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270023360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:10,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310639111] [2021-06-05 15:38:10,848 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 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 15:38:10,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:38:10,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:10,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:38:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:11,194 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:11,194 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 31 treesize of output 19 [2021-06-05 15:38:11,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:11,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:11,201 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 15:38:11,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:38:11,264 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:11,264 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 25 treesize of output 13 [2021-06-05 15:38:11,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:11,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:11,268 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 15:38:11,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:11,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310639111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:11,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:11,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-06-05 15:38:11,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005528617] [2021-06-05 15:38:11,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:38:11,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:38:11,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:38:11,347 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:38:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:16,490 INFO L93 Difference]: Finished difference Result 32902 states and 109101 transitions. [2021-06-05 15:38:16,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 15:38:16,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-06-05 15:38:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:16,552 INFO L225 Difference]: With dead ends: 32902 [2021-06-05 15:38:16,552 INFO L226 Difference]: Without dead ends: 32417 [2021-06-05 15:38:16,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 4074.9ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-06-05 15:38:16,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32417 states. [2021-06-05 15:38:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32417 to 9018. [2021-06-05 15:38:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 3.301763335921038) internal successors, (29772), 9017 states have internal predecessors, (29772), 0 states have call successors, (0), 0 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 15:38:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 29772 transitions. [2021-06-05 15:38:16,816 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 29772 transitions. Word has length 44 [2021-06-05 15:38:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:16,816 INFO L482 AbstractCegarLoop]: Abstraction has 9018 states and 29772 transitions. [2021-06-05 15:38:16,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 15:38:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 29772 transitions. [2021-06-05 15:38:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:38:16,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:16,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:38:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:17,029 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 856011747, now seen corresponding path program 31 times [2021-06-05 15:38:17,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:17,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371778782] [2021-06-05 15:38:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:38:17,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371778782] [2021-06-05 15:38:17,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371778782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:17,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586979977] [2021-06-05 15:38:17,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:38:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:17,671 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:17,671 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 31 treesize of output 19 [2021-06-05 15:38:17,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:17,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:17,679 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 15:38:17,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:38:17,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:17,738 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 25 treesize of output 13 [2021-06-05 15:38:17,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:17,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:17,743 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 15:38:17,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:17,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586979977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:17,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:17,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 15:38:17,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880130393] [2021-06-05 15:38:17,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:38:17,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:17,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:38:17,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:38:17,811 INFO L87 Difference]: Start difference. First operand 9018 states and 29772 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 15:38:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:23,306 INFO L93 Difference]: Finished difference Result 32479 states and 108314 transitions. [2021-06-05 15:38:23,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 15:38:23,306 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 44 [2021-06-05 15:38:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:23,362 INFO L225 Difference]: With dead ends: 32479 [2021-06-05 15:38:23,362 INFO L226 Difference]: Without dead ends: 28654 [2021-06-05 15:38:23,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 4179.6ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-06-05 15:38:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28654 states. [2021-06-05 15:38:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28654 to 9358. [2021-06-05 15:38:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9358 states, 9357 states have (on average 3.2972106444373197) internal successors, (30852), 9357 states have internal predecessors, (30852), 0 states have call successors, (0), 0 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 15:38:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9358 states to 9358 states and 30852 transitions. [2021-06-05 15:38:23,595 INFO L78 Accepts]: Start accepts. Automaton has 9358 states and 30852 transitions. Word has length 44 [2021-06-05 15:38:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:23,595 INFO L482 AbstractCegarLoop]: Abstraction has 9358 states and 30852 transitions. [2021-06-05 15:38:23,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 15:38:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9358 states and 30852 transitions. [2021-06-05 15:38:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:38:23,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:23,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1] [2021-06-05 15:38:23,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:23,807 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash 218619737, now seen corresponding path program 32 times [2021-06-05 15:38:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:23,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393192877] [2021-06-05 15:38:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:38:24,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:24,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393192877] [2021-06-05 15:38:24,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393192877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:24,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523013407] [2021-06-05 15:38:24,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:24,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:38:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:38:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:24,461 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:24,461 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 31 treesize of output 19 [2021-06-05 15:38:24,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:24,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:24,468 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 15:38:24,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:38:24,535 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:24,536 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 25 treesize of output 13 [2021-06-05 15:38:24,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:24,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:24,541 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 15:38:24,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523013407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:24,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:24,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-06-05 15:38:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167184859] [2021-06-05 15:38:24,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:38:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:38:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:38:24,601 INFO L87 Difference]: Start difference. First operand 9358 states and 30852 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:38:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:30,022 INFO L93 Difference]: Finished difference Result 35967 states and 119998 transitions. [2021-06-05 15:38:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 15:38:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:38:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:30,087 INFO L225 Difference]: With dead ends: 35967 [2021-06-05 15:38:30,087 INFO L226 Difference]: Without dead ends: 33259 [2021-06-05 15:38:30,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 4519.7ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-06-05 15:38:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2021-06-05 15:38:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 9428. [2021-06-05 15:38:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.294049008168028) internal successors, (31053), 9427 states have internal predecessors, (31053), 0 states have call successors, (0), 0 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 15:38:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 31053 transitions. [2021-06-05 15:38:30,365 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 31053 transitions. Word has length 44 [2021-06-05 15:38:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:30,365 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 31053 transitions. [2021-06-05 15:38:30,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 15:38:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 31053 transitions. [2021-06-05 15:38:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:38:30,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:30,378 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2021-06-05 15:38:30,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 15:38:30,578 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:30,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:30,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1309223083, now seen corresponding path program 33 times [2021-06-05 15:38:30,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:30,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249498262] [2021-06-05 15:38:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:30,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249498262] [2021-06-05 15:38:30,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249498262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:30,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675233095] [2021-06-05 15:38:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:38:30,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:38:30,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:30,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:38:30,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:38:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675233095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:38:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472791977] [2021-06-05 15:38:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:38:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:38:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:38:30,681 INFO L87 Difference]: Start difference. First operand 9428 states and 31053 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 15:38:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:30,727 INFO L93 Difference]: Finished difference Result 14357 states and 47370 transitions. [2021-06-05 15:38:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:38:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 15:38:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:30,751 INFO L225 Difference]: With dead ends: 14357 [2021-06-05 15:38:30,751 INFO L226 Difference]: Without dead ends: 14153 [2021-06-05 15:38:30,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:38:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-06-05 15:38:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 10944. [2021-06-05 15:38:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 3.3225806451612905) internal successors, (36359), 10943 states have internal predecessors, (36359), 0 states have call successors, (0), 0 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 15:38:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 36359 transitions. [2021-06-05 15:38:30,951 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 36359 transitions. Word has length 47 [2021-06-05 15:38:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:30,951 INFO L482 AbstractCegarLoop]: Abstraction has 10944 states and 36359 transitions. [2021-06-05 15:38:30,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 15:38:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 36359 transitions. [2021-06-05 15:38:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:38:30,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:30,965 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2021-06-05 15:38:31,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:31,166 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2079845064, now seen corresponding path program 34 times [2021-06-05 15:38:31,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:31,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616178291] [2021-06-05 15:38:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:31,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:31,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616178291] [2021-06-05 15:38:31,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616178291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710767543] [2021-06-05 15:38:31,407 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 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 15:38:31,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:38:31,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:38:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:31,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:31,743 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 29 treesize of output 17 [2021-06-05 15:38:31,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:31,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:31,750 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 15:38:31,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:38:31,872 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:31,872 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 25 treesize of output 13 [2021-06-05 15:38:31,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:31,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:31,878 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 15:38:31,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710767543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:31,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:31,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:31,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931551542] [2021-06-05 15:38:31,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:31,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:31,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:31,938 INFO L87 Difference]: Start difference. First operand 10944 states and 36359 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:34,002 INFO L93 Difference]: Finished difference Result 26668 states and 88897 transitions. [2021-06-05 15:38:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:38:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:38:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:34,052 INFO L225 Difference]: With dead ends: 26668 [2021-06-05 15:38:34,052 INFO L226 Difference]: Without dead ends: 26368 [2021-06-05 15:38:34,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1601.1ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:38:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26368 states. [2021-06-05 15:38:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26368 to 11105. [2021-06-05 15:38:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11104 states have (on average 3.3218659942363113) internal successors, (36886), 11104 states have internal predecessors, (36886), 0 states have call successors, (0), 0 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 15:38:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 36886 transitions. [2021-06-05 15:38:34,293 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 36886 transitions. Word has length 47 [2021-06-05 15:38:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:34,293 INFO L482 AbstractCegarLoop]: Abstraction has 11105 states and 36886 transitions. [2021-06-05 15:38:34,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 36886 transitions. [2021-06-05 15:38:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:38:34,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:34,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2021-06-05 15:38:34,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 15:38:34,508 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1161766054, now seen corresponding path program 35 times [2021-06-05 15:38:34,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:34,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152943332] [2021-06-05 15:38:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:34,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152943332] [2021-06-05 15:38:34,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152943332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247783055] [2021-06-05 15:38:34,759 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:34,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:38:34,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:34,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:38:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:35,131 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:35,132 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 29 treesize of output 17 [2021-06-05 15:38:35,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:35,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:35,139 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 15:38:35,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:38:35,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:35,257 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 25 treesize of output 13 [2021-06-05 15:38:35,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:35,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:35,262 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 15:38:35,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:35,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247783055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:35,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:35,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:35,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293252512] [2021-06-05 15:38:35,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:35,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:35,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:35,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:35,330 INFO L87 Difference]: Start difference. First operand 11105 states and 36886 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:38,248 INFO L93 Difference]: Finished difference Result 32478 states and 107950 transitions. [2021-06-05 15:38:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:38:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:38:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:38,309 INFO L225 Difference]: With dead ends: 32478 [2021-06-05 15:38:38,309 INFO L226 Difference]: Without dead ends: 32178 [2021-06-05 15:38:38,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2285.6ms TimeCoverageRelationStatistics Valid=1265, Invalid=7477, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:38:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2021-06-05 15:38:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 10959. [2021-06-05 15:38:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10958 states have (on average 3.322139076473809) internal successors, (36404), 10958 states have internal predecessors, (36404), 0 states have call successors, (0), 0 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 15:38:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 36404 transitions. [2021-06-05 15:38:38,587 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 36404 transitions. Word has length 47 [2021-06-05 15:38:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:38,587 INFO L482 AbstractCegarLoop]: Abstraction has 10959 states and 36404 transitions. [2021-06-05 15:38:38,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 36404 transitions. [2021-06-05 15:38:38,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:38:38,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:38,601 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2021-06-05 15:38:38,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:38:38,802 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:38,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1559125806, now seen corresponding path program 36 times [2021-06-05 15:38:38,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778327988] [2021-06-05 15:38:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:39,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:39,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778327988] [2021-06-05 15:38:39,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778327988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:39,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406664299] [2021-06-05 15:38:39,114 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:39,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:38:39,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:38:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:39,431 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:39,431 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 29 treesize of output 17 [2021-06-05 15:38:39,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:39,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:39,438 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 15:38:39,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:38:39,558 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:39,558 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 25 treesize of output 13 [2021-06-05 15:38:39,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:39,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:39,577 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 15:38:39,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406664299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:39,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:39,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:39,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657545602] [2021-06-05 15:38:39,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:39,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:39,637 INFO L87 Difference]: Start difference. First operand 10959 states and 36404 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:41,707 INFO L93 Difference]: Finished difference Result 26320 states and 87742 transitions. [2021-06-05 15:38:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:38:41,707 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:38:41,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:41,756 INFO L225 Difference]: With dead ends: 26320 [2021-06-05 15:38:41,756 INFO L226 Difference]: Without dead ends: 26020 [2021-06-05 15:38:41,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:38:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2021-06-05 15:38:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 10970. [2021-06-05 15:38:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 3.322271857051691) internal successors, (36442), 10969 states have internal predecessors, (36442), 0 states have call successors, (0), 0 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 15:38:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 36442 transitions. [2021-06-05 15:38:41,988 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 36442 transitions. Word has length 47 [2021-06-05 15:38:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:41,988 INFO L482 AbstractCegarLoop]: Abstraction has 10970 states and 36442 transitions. [2021-06-05 15:38:41,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 36442 transitions. [2021-06-05 15:38:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:38:42,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:42,001 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2021-06-05 15:38:42,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:38:42,202 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash 641046796, now seen corresponding path program 37 times [2021-06-05 15:38:42,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:42,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967208547] [2021-06-05 15:38:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:42,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967208547] [2021-06-05 15:38:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967208547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120949207] [2021-06-05 15:38:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:42,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 15:38:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:42,768 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:42,768 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 29 treesize of output 17 [2021-06-05 15:38:42,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:42,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:42,775 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 15:38:42,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:38:42,895 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:42,895 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 25 treesize of output 13 [2021-06-05 15:38:42,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:42,900 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 15:38:42,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120949207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:42,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:42,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:42,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255244006] [2021-06-05 15:38:42,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:42,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:42,961 INFO L87 Difference]: Start difference. First operand 10970 states and 36442 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:45,702 INFO L93 Difference]: Finished difference Result 31704 states and 105322 transitions. [2021-06-05 15:38:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:38:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:38:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:45,761 INFO L225 Difference]: With dead ends: 31704 [2021-06-05 15:38:45,761 INFO L226 Difference]: Without dead ends: 31404 [2021-06-05 15:38:45,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2124.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:38:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2021-06-05 15:38:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 10809. [2021-06-05 15:38:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 3.3230014803849) internal successors, (35915), 10808 states have internal predecessors, (35915), 0 states have call successors, (0), 0 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 15:38:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 35915 transitions. [2021-06-05 15:38:46,024 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 35915 transitions. Word has length 47 [2021-06-05 15:38:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:46,024 INFO L482 AbstractCegarLoop]: Abstraction has 10809 states and 35915 transitions. [2021-06-05 15:38:46,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:38:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 35915 transitions. [2021-06-05 15:38:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:38:46,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:46,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-06-05 15:38:46,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:38:46,238 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash -590498608, now seen corresponding path program 38 times [2021-06-05 15:38:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:46,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920127871] [2021-06-05 15:38:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:38:46,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920127871] [2021-06-05 15:38:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920127871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548595315] [2021-06-05 15:38:46,267 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:46,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:38:46,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:38:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:38:46,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548595315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:46,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:46,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 15:38:46,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301633633] [2021-06-05 15:38:46,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:38:46,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:38:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:38:46,350 INFO L87 Difference]: Start difference. First operand 10809 states and 35915 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 15:38:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:46,416 INFO L93 Difference]: Finished difference Result 18453 states and 61519 transitions. [2021-06-05 15:38:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:38:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 51 [2021-06-05 15:38:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:46,451 INFO L225 Difference]: With dead ends: 18453 [2021-06-05 15:38:46,451 INFO L226 Difference]: Without dead ends: 17839 [2021-06-05 15:38:46,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:38:46,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2021-06-05 15:38:46,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 12699. [2021-06-05 15:38:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12699 states, 12698 states have (on average 3.361946763269806) internal successors, (42690), 12698 states have internal predecessors, (42690), 0 states have call successors, (0), 0 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 15:38:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12699 states to 12699 states and 42690 transitions. [2021-06-05 15:38:46,688 INFO L78 Accepts]: Start accepts. Automaton has 12699 states and 42690 transitions. Word has length 51 [2021-06-05 15:38:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:46,688 INFO L482 AbstractCegarLoop]: Abstraction has 12699 states and 42690 transitions. [2021-06-05 15:38:46,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 15:38:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 12699 states and 42690 transitions. [2021-06-05 15:38:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:38:46,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:46,707 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-06-05 15:38:46,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:46,907 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1803464833, now seen corresponding path program 39 times [2021-06-05 15:38:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:46,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088330348] [2021-06-05 15:38:46,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:47,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:47,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088330348] [2021-06-05 15:38:47,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088330348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:47,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147134642] [2021-06-05 15:38:47,295 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:47,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:38:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:38:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:47,652 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:38:47,652 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 35 treesize of output 19 [2021-06-05 15:38:47,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:47,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:47,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:38:47,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:29 [2021-06-05 15:38:47,796 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:47,797 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 25 treesize of output 13 [2021-06-05 15:38:47,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:47,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:47,801 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 15:38:47,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:47,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147134642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:47,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:47,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:47,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751229512] [2021-06-05 15:38:47,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:47,864 INFO L87 Difference]: Start difference. First operand 12699 states and 42690 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:38:55,206 INFO L93 Difference]: Finished difference Result 86229 states and 293816 transitions. [2021-06-05 15:38:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-06-05 15:38:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:38:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:38:55,390 INFO L225 Difference]: With dead ends: 86229 [2021-06-05 15:38:55,390 INFO L226 Difference]: Without dead ends: 84335 [2021-06-05 15:38:55,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 5565.8ms TimeCoverageRelationStatistics Valid=5140, Invalid=40442, Unknown=0, NotChecked=0, Total=45582 [2021-06-05 15:38:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84335 states. [2021-06-05 15:38:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84335 to 13212. [2021-06-05 15:38:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 3.3770342896071455) internal successors, (44614), 13211 states have internal predecessors, (44614), 0 states have call successors, (0), 0 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 15:38:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 44614 transitions. [2021-06-05 15:38:56,274 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 44614 transitions. Word has length 51 [2021-06-05 15:38:56,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:38:56,274 INFO L482 AbstractCegarLoop]: Abstraction has 13212 states and 44614 transitions. [2021-06-05 15:38:56,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:38:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 44614 transitions. [2021-06-05 15:38:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:38:56,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:38:56,293 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-06-05 15:38:56,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:56,493 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:38:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:38:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash -746735621, now seen corresponding path program 40 times [2021-06-05 15:38:56,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:38:56,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040891921] [2021-06-05 15:38:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:38:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:38:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:56,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:38:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040891921] [2021-06-05 15:38:56,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040891921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543201727] [2021-06-05 15:38:56,788 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:38:56,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:38:56,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:38:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:38:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:38:57,161 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:38:57,161 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 35 treesize of output 19 [2021-06-05 15:38:57,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:57,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:57,170 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 15:38:57,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-06-05 15:38:57,340 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:38:57,340 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 25 treesize of output 13 [2021-06-05 15:38:57,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:38:57,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:38:57,349 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 15:38:57,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-06-05 15:38:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:38:57,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543201727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:38:57,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:38:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 15:38:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455526935] [2021-06-05 15:38:57,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:38:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:38:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:38:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:38:57,457 INFO L87 Difference]: Start difference. First operand 13212 states and 44614 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:04,666 INFO L93 Difference]: Finished difference Result 80772 states and 276597 transitions. [2021-06-05 15:39:04,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 15:39:04,666 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:39:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:04,834 INFO L225 Difference]: With dead ends: 80772 [2021-06-05 15:39:04,835 INFO L226 Difference]: Without dead ends: 78736 [2021-06-05 15:39:04,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5257.5ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-06-05 15:39:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2021-06-05 15:39:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 13623. [2021-06-05 15:39:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13622 states have (on average 3.3828365878725593) internal successors, (46081), 13622 states have internal predecessors, (46081), 0 states have call successors, (0), 0 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 15:39:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 46081 transitions. [2021-06-05 15:39:05,610 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 46081 transitions. Word has length 51 [2021-06-05 15:39:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 13623 states and 46081 transitions. [2021-06-05 15:39:05,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:39:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 46081 transitions. [2021-06-05 15:39:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:39:05,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:05,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:39:05,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:05,835 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash 643422605, now seen corresponding path program 41 times [2021-06-05 15:39:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:05,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288843338] [2021-06-05 15:39:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 15:39:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288843338] [2021-06-05 15:39:06,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288843338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230955971] [2021-06-05 15:39:06,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:06,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:39:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:39:06,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:06,960 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:39:06,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:06,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:06,977 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 15:39:06,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:42 [2021-06-05 15:39:07,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:39:07,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:07,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:07,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:39:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:39:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:39:07,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:07,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:07,098 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 15:39:07,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:39:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:07,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230955971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:07,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:07,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-06-05 15:39:07,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832696295] [2021-06-05 15:39:07,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:39:07,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:39:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:39:07,178 INFO L87 Difference]: Start difference. First operand 13623 states and 46081 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 15:39:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:18,258 INFO L93 Difference]: Finished difference Result 92840 states and 316083 transitions. [2021-06-05 15:39:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-06-05 15:39:18,259 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:39:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:18,448 INFO L225 Difference]: With dead ends: 92840 [2021-06-05 15:39:18,448 INFO L226 Difference]: Without dead ends: 88224 [2021-06-05 15:39:18,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21094 ImplicationChecksByTransitivity, 8965.7ms TimeCoverageRelationStatistics Valid=5822, Invalid=46848, Unknown=0, NotChecked=0, Total=52670 [2021-06-05 15:39:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88224 states. [2021-06-05 15:39:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88224 to 14423. [2021-06-05 15:39:19,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 14422 states have (on average 3.370891693246429) internal successors, (48615), 14422 states have internal predecessors, (48615), 0 states have call successors, (0), 0 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 15:39:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 48615 transitions. [2021-06-05 15:39:19,293 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 48615 transitions. Word has length 54 [2021-06-05 15:39:19,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:19,294 INFO L482 AbstractCegarLoop]: Abstraction has 14423 states and 48615 transitions. [2021-06-05 15:39:19,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 15:39:19,294 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 48615 transitions. [2021-06-05 15:39:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:39:19,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:19,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:39:19,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 15:39:19,515 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1581400071, now seen corresponding path program 42 times [2021-06-05 15:39:19,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:19,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53763882] [2021-06-05 15:39:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:39:19,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53763882] [2021-06-05 15:39:19,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53763882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:19,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273612768] [2021-06-05 15:39:19,822 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:19,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:39:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:19,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:39:19,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:20,546 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:39:20,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:20,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:20,556 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 15:39:20,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:39:20,720 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:20,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:39:20,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:20,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:20,725 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 15:39:20,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:39:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:20,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273612768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:20,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:20,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:39:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212849763] [2021-06-05 15:39:20,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:39:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:39:20,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:39:20,800 INFO L87 Difference]: Start difference. First operand 14423 states and 48615 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:39:30,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:30,952 INFO L93 Difference]: Finished difference Result 91747 states and 309740 transitions. [2021-06-05 15:39:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-06-05 15:39:30,952 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:39:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:31,138 INFO L225 Difference]: With dead ends: 91747 [2021-06-05 15:39:31,138 INFO L226 Difference]: Without dead ends: 90897 [2021-06-05 15:39:31,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 7844.7ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-06-05 15:39:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90897 states. [2021-06-05 15:39:31,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90897 to 15287. [2021-06-05 15:39:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15286 states have (on average 3.3639931963888525) internal successors, (51422), 15286 states have internal predecessors, (51422), 0 states have call successors, (0), 0 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 15:39:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 51422 transitions. [2021-06-05 15:39:31,945 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 51422 transitions. Word has length 54 [2021-06-05 15:39:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:31,945 INFO L482 AbstractCegarLoop]: Abstraction has 15287 states and 51422 transitions. [2021-06-05 15:39:31,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:39:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 51422 transitions. [2021-06-05 15:39:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:39:31,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:31,965 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:39:32,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:32,165 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:32,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2088723877, now seen corresponding path program 43 times [2021-06-05 15:39:32,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:32,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896383680] [2021-06-05 15:39:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:39:32,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896383680] [2021-06-05 15:39:32,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896383680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:32,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724961069] [2021-06-05 15:39:32,458 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:32,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:39:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:33,000 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:33,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:39:33,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:33,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:33,009 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 15:39:33,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:39:33,161 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:33,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:39:33,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:33,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:33,166 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 15:39:33,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:39:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:33,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724961069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:33,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:33,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:39:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124975630] [2021-06-05 15:39:33,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:39:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:39:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:39:33,234 INFO L87 Difference]: Start difference. First operand 15287 states and 51422 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:39:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:39:45,078 INFO L93 Difference]: Finished difference Result 101039 states and 340837 transitions. [2021-06-05 15:39:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-06-05 15:39:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:39:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:39:45,309 INFO L225 Difference]: With dead ends: 101039 [2021-06-05 15:39:45,310 INFO L226 Difference]: Without dead ends: 100149 [2021-06-05 15:39:45,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25131 ImplicationChecksByTransitivity, 9497.2ms TimeCoverageRelationStatistics Valid=6462, Invalid=56288, Unknown=0, NotChecked=0, Total=62750 [2021-06-05 15:39:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100149 states. [2021-06-05 15:39:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100149 to 15370. [2021-06-05 15:39:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 15369 states have (on average 3.364695165593077) internal successors, (51712), 15369 states have internal predecessors, (51712), 0 states have call successors, (0), 0 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 15:39:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 51712 transitions. [2021-06-05 15:39:46,179 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 51712 transitions. Word has length 54 [2021-06-05 15:39:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:39:46,179 INFO L482 AbstractCegarLoop]: Abstraction has 15370 states and 51712 transitions. [2021-06-05 15:39:46,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:39:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 51712 transitions. [2021-06-05 15:39:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:39:46,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:39:46,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:39:46,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 15:39:46,409 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:39:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:39:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1288164409, now seen corresponding path program 44 times [2021-06-05 15:39:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:39:46,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74963425] [2021-06-05 15:39:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:39:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:39:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:39:46,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:39:46,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74963425] [2021-06-05 15:39:46,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74963425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:46,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981247664] [2021-06-05 15:39:46,718 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:39:46,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:39:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:39:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:39:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:39:47,000 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 15:39:47,445 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:39:47,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:47,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:47,454 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 15:39:47,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:39:47,612 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:39:47,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:39:47,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:39:47,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:39:47,617 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 15:39:47,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:39:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:39:47,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981247664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:39:47,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:39:47,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:39:47,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803406437] [2021-06-05 15:39:47,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:39:47,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:39:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:39:47,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:39:47,696 INFO L87 Difference]: Start difference. First operand 15370 states and 51712 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:01,932 INFO L93 Difference]: Finished difference Result 124978 states and 424154 transitions. [2021-06-05 15:40:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-06-05 15:40:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:40:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:02,229 INFO L225 Difference]: With dead ends: 124978 [2021-06-05 15:40:02,229 INFO L226 Difference]: Without dead ends: 121408 [2021-06-05 15:40:02,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 11715.2ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-06-05 15:40:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121408 states. [2021-06-05 15:40:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121408 to 17376. [2021-06-05 15:40:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17375 states have (on average 3.3524028776978416) internal successors, (58248), 17375 states have internal predecessors, (58248), 0 states have call successors, (0), 0 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 15:40:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 58248 transitions. [2021-06-05 15:40:03,628 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 58248 transitions. Word has length 54 [2021-06-05 15:40:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:03,629 INFO L482 AbstractCegarLoop]: Abstraction has 17376 states and 58248 transitions. [2021-06-05 15:40:03,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 58248 transitions. [2021-06-05 15:40:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:40:03,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:03,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:40:03,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:40:03,871 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1594702095, now seen corresponding path program 45 times [2021-06-05 15:40:03,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:03,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114087077] [2021-06-05 15:40:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:40:04,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114087077] [2021-06-05 15:40:04,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114087077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:04,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792230266] [2021-06-05 15:40:04,203 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:40:04,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:40:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:04,953 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:04,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:40:04,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:04,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:04,964 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 15:40:04,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:40:05,097 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:05,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:40:05,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:05,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:05,153 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 15:40:05,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:40:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:05,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792230266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:05,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:05,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:40:05,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923489263] [2021-06-05 15:40:05,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:40:05,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:40:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:40:05,223 INFO L87 Difference]: Start difference. First operand 17376 states and 58248 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:16,647 INFO L93 Difference]: Finished difference Result 100564 states and 339046 transitions. [2021-06-05 15:40:16,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-06-05 15:40:16,647 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:40:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:16,883 INFO L225 Difference]: With dead ends: 100564 [2021-06-05 15:40:16,883 INFO L226 Difference]: Without dead ends: 99734 [2021-06-05 15:40:16,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 9192.5ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-06-05 15:40:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99734 states. [2021-06-05 15:40:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99734 to 17519. [2021-06-05 15:40:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 3.3529512501427106) internal successors, (58737), 17518 states have internal predecessors, (58737), 0 states have call successors, (0), 0 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 15:40:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 58737 transitions. [2021-06-05 15:40:17,995 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 58737 transitions. Word has length 54 [2021-06-05 15:40:17,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:17,995 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 58737 transitions. [2021-06-05 15:40:17,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:17,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 58737 transitions. [2021-06-05 15:40:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:40:18,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:18,022 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:40:18,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:40:18,232 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:18,232 INFO L82 PathProgramCache]: Analyzing trace with hash 676623085, now seen corresponding path program 46 times [2021-06-05 15:40:18,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:18,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247793382] [2021-06-05 15:40:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:40:18,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:18,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247793382] [2021-06-05 15:40:18,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247793382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:18,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364771144] [2021-06-05 15:40:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:18,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:40:18,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:40:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:19,176 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:19,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:40:19,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:19,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:19,186 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 15:40:19,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:40:19,308 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:19,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:40:19,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:19,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:19,313 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 15:40:19,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:40:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:19,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364771144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:19,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:19,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:40:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549039959] [2021-06-05 15:40:19,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:40:19,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:40:19,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:40:19,447 INFO L87 Difference]: Start difference. First operand 17519 states and 58737 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:24,744 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-06-05 15:40:25,267 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-06-05 15:40:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:34,074 INFO L93 Difference]: Finished difference Result 106844 states and 359808 transitions. [2021-06-05 15:40:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-06-05 15:40:34,074 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:40:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:34,326 INFO L225 Difference]: With dead ends: 106844 [2021-06-05 15:40:34,326 INFO L226 Difference]: Without dead ends: 105974 [2021-06-05 15:40:34,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 11432.5ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 15:40:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105974 states. [2021-06-05 15:40:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105974 to 16906. [2021-06-05 15:40:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16906 states, 16905 states have (on average 3.3510795622596863) internal successors, (56650), 16905 states have internal predecessors, (56650), 0 states have call successors, (0), 0 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 15:40:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 56650 transitions. [2021-06-05 15:40:35,482 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 56650 transitions. Word has length 54 [2021-06-05 15:40:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:35,482 INFO L482 AbstractCegarLoop]: Abstraction has 16906 states and 56650 transitions. [2021-06-05 15:40:35,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 56650 transitions. [2021-06-05 15:40:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:40:35,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:35,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:40:35,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 15:40:35,706 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1343056893, now seen corresponding path program 47 times [2021-06-05 15:40:35,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:35,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348008722] [2021-06-05 15:40:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:40:36,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348008722] [2021-06-05 15:40:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348008722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922735225] [2021-06-05 15:40:36,038 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:36,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:40:36,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:36,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:40:36,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:36,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:40:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:36,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:36,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:36,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:40:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:40:36,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:36,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:36,811 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 15:40:36,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:37 [2021-06-05 15:40:36,897 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:36,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:40:36,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:36,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:36,904 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 15:40:36,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:40:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:36,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922735225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:36,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:36,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:40:36,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669792683] [2021-06-05 15:40:36,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:40:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:40:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:40:36,979 INFO L87 Difference]: Start difference. First operand 16906 states and 56650 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:40:48,538 INFO L93 Difference]: Finished difference Result 86669 states and 292345 transitions. [2021-06-05 15:40:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-05 15:40:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:40:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:40:48,726 INFO L225 Difference]: With dead ends: 86669 [2021-06-05 15:40:48,726 INFO L226 Difference]: Without dead ends: 85459 [2021-06-05 15:40:48,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 9333.2ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-06-05 15:40:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85459 states. [2021-06-05 15:40:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85459 to 16784. [2021-06-05 15:40:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 16783 states have (on average 3.352320800810344) internal successors, (56262), 16783 states have internal predecessors, (56262), 0 states have call successors, (0), 0 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 15:40:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 56262 transitions. [2021-06-05 15:40:49,429 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 56262 transitions. Word has length 54 [2021-06-05 15:40:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:40:49,429 INFO L482 AbstractCegarLoop]: Abstraction has 16784 states and 56262 transitions. [2021-06-05 15:40:49,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:40:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 56262 transitions. [2021-06-05 15:40:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:40:49,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:40:49,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:40:49,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:49,653 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:40:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:40:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 770927037, now seen corresponding path program 48 times [2021-06-05 15:40:49,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:40:49,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079071219] [2021-06-05 15:40:49,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:40:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:40:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:40:50,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:40:50,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079071219] [2021-06-05 15:40:50,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079071219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:50,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267680040] [2021-06-05 15:40:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:40:50,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:40:50,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:40:50,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:40:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:40:50,720 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:40:50,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:40:50,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:50,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:50,728 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 15:40:50,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:40:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:50,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:40:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:40:50,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-06-05 15:40:50,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:40:50,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:40:50,939 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 15:40:50,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:40:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:40:51,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267680040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:40:51,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:40:51,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:40:51,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164452792] [2021-06-05 15:40:51,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:40:51,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:40:51,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:40:51,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:40:51,016 INFO L87 Difference]: Start difference. First operand 16784 states and 56262 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:41:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:03,178 INFO L93 Difference]: Finished difference Result 91509 states and 308567 transitions. [2021-06-05 15:41:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-06-05 15:41:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:41:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:03,388 INFO L225 Difference]: With dead ends: 91509 [2021-06-05 15:41:03,389 INFO L226 Difference]: Without dead ends: 90649 [2021-06-05 15:41:03,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23550 ImplicationChecksByTransitivity, 9180.7ms TimeCoverageRelationStatistics Valid=5558, Invalid=55204, Unknown=0, NotChecked=0, Total=60762 [2021-06-05 15:41:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90649 states. [2021-06-05 15:41:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90649 to 17604. [2021-06-05 15:41:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17604 states, 17603 states have (on average 3.3469295006532978) internal successors, (58916), 17603 states have internal predecessors, (58916), 0 states have call successors, (0), 0 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 15:41:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17604 states to 17604 states and 58916 transitions. [2021-06-05 15:41:04,250 INFO L78 Accepts]: Start accepts. Automaton has 17604 states and 58916 transitions. Word has length 54 [2021-06-05 15:41:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:04,250 INFO L482 AbstractCegarLoop]: Abstraction has 17604 states and 58916 transitions. [2021-06-05 15:41:04,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:41:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 17604 states and 58916 transitions. [2021-06-05 15:41:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:41:04,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:04,274 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:41:04,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 15:41:04,474 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash -347938093, now seen corresponding path program 49 times [2021-06-05 15:41:04,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:04,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536576957] [2021-06-05 15:41:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:41:04,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:04,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536576957] [2021-06-05 15:41:04,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536576957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:04,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072020055] [2021-06-05 15:41:04,845 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:41:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:05,499 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:41:05,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:05,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:05,509 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 15:41:05,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:41:05,635 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:05,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:41:05,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:05,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:05,640 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 15:41:05,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:41:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:05,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072020055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:05,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:05,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:41:05,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491253764] [2021-06-05 15:41:05,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:41:05,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:05,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:41:05,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:41:05,715 INFO L87 Difference]: Start difference. First operand 17604 states and 58916 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:41:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:16,566 INFO L93 Difference]: Finished difference Result 77944 states and 263222 transitions. [2021-06-05 15:41:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-06-05 15:41:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:41:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:16,732 INFO L225 Difference]: With dead ends: 77944 [2021-06-05 15:41:16,732 INFO L226 Difference]: Without dead ends: 77094 [2021-06-05 15:41:16,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18674 ImplicationChecksByTransitivity, 8632.2ms TimeCoverageRelationStatistics Valid=5058, Invalid=44004, Unknown=0, NotChecked=0, Total=49062 [2021-06-05 15:41:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77094 states. [2021-06-05 15:41:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77094 to 18339. [2021-06-05 15:41:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 3.3434943832479007) internal successors, (61313), 18338 states have internal predecessors, (61313), 0 states have call successors, (0), 0 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 15:41:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 61313 transitions. [2021-06-05 15:41:17,391 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 61313 transitions. Word has length 54 [2021-06-05 15:41:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:17,391 INFO L482 AbstractCegarLoop]: Abstraction has 18339 states and 61313 transitions. [2021-06-05 15:41:17,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:41:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 61313 transitions. [2021-06-05 15:41:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:41:17,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:17,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:41:17,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:17,616 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1720996819, now seen corresponding path program 50 times [2021-06-05 15:41:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:17,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986286874] [2021-06-05 15:41:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:41:17,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986286874] [2021-06-05 15:41:17,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986286874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:17,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368586489] [2021-06-05 15:41:17,977 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:18,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:41:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:41:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:18,565 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:18,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:41:18,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:18,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:18,574 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 15:41:18,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:41:18,857 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:18,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:41:18,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:18,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:18,862 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 15:41:18,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:41:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:18,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368586489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:18,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:18,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:41:18,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681652943] [2021-06-05 15:41:18,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:41:18,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:41:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:18,953 INFO L87 Difference]: Start difference. First operand 18339 states and 61313 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:41:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:30,182 INFO L93 Difference]: Finished difference Result 91695 states and 308842 transitions. [2021-06-05 15:41:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-06-05 15:41:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:41:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:30,383 INFO L225 Difference]: With dead ends: 91695 [2021-06-05 15:41:30,383 INFO L226 Difference]: Without dead ends: 90875 [2021-06-05 15:41:30,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20016 ImplicationChecksByTransitivity, 8196.0ms TimeCoverageRelationStatistics Valid=4724, Invalid=48406, Unknown=0, NotChecked=0, Total=53130 [2021-06-05 15:41:30,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-06-05 15:41:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 18867. [2021-06-05 15:41:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18867 states, 18866 states have (on average 3.336319304569066) internal successors, (62943), 18866 states have internal predecessors, (62943), 0 states have call successors, (0), 0 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 15:41:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18867 states to 18867 states and 62943 transitions. [2021-06-05 15:41:31,116 INFO L78 Accepts]: Start accepts. Automaton has 18867 states and 62943 transitions. Word has length 54 [2021-06-05 15:41:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:31,117 INFO L482 AbstractCegarLoop]: Abstraction has 18867 states and 62943 transitions. [2021-06-05 15:41:31,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:41:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18867 states and 62943 transitions. [2021-06-05 15:41:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:41:31,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:31,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:41:31,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:31,341 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1213673013, now seen corresponding path program 51 times [2021-06-05 15:41:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114416642] [2021-06-05 15:41:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:41:31,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:31,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114416642] [2021-06-05 15:41:31,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114416642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:31,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975956089] [2021-06-05 15:41:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:31,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:41:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:41:31,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:32,273 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:32,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:41:32,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:32,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:32,282 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 15:41:32,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:41:32,448 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:41:32,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:32,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:32,453 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 15:41:32,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:41:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975956089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:32,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:32,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:41:32,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829976105] [2021-06-05 15:41:32,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:41:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:41:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:32,528 INFO L87 Difference]: Start difference. First operand 18867 states and 62943 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:41:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:41:46,668 INFO L93 Difference]: Finished difference Result 116913 states and 393329 transitions. [2021-06-05 15:41:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-06-05 15:41:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:41:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:41:46,929 INFO L225 Difference]: With dead ends: 116913 [2021-06-05 15:41:46,929 INFO L226 Difference]: Without dead ends: 116083 [2021-06-05 15:41:46,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 10714.5ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 15:41:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116083 states. [2021-06-05 15:41:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116083 to 20115. [2021-06-05 15:41:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 3.33016804215969) internal successors, (66983), 20114 states have internal predecessors, (66983), 0 states have call successors, (0), 0 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 15:41:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 66983 transitions. [2021-06-05 15:41:47,868 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 66983 transitions. Word has length 54 [2021-06-05 15:41:47,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:41:47,868 INFO L482 AbstractCegarLoop]: Abstraction has 20115 states and 66983 transitions. [2021-06-05 15:41:47,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:41:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 66983 transitions. [2021-06-05 15:41:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:41:47,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:41:47,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:41:48,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 15:41:48,094 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:41:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:41:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash 295594003, now seen corresponding path program 52 times [2021-06-05 15:41:48,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:41:48,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996030079] [2021-06-05 15:41:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:41:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:41:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:41:48,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:41:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996030079] [2021-06-05 15:41:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996030079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102743940] [2021-06-05 15:41:48,464 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:41:48,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:41:48,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:41:48,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:41:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:41:49,079 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:41:49,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:49,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:49,088 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 15:41:49,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:41:49,251 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:41:49,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:41:49,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:41:49,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:41:49,256 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 15:41:49,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:41:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:41:49,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102743940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:41:49,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:41:49,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:41:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006129978] [2021-06-05 15:41:49,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:41:49,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:41:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:41:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:41:49,331 INFO L87 Difference]: Start difference. First operand 20115 states and 66983 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:41:54,411 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 15:42:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:04,520 INFO L93 Difference]: Finished difference Result 124269 states and 417429 transitions. [2021-06-05 15:42:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 15:42:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:42:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:04,804 INFO L225 Difference]: With dead ends: 124269 [2021-06-05 15:42:04,805 INFO L226 Difference]: Without dead ends: 122609 [2021-06-05 15:42:04,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 11661.4ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 15:42:04,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122609 states. [2021-06-05 15:42:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122609 to 21964. [2021-06-05 15:42:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21964 states, 21963 states have (on average 3.322087146564677) internal successors, (72963), 21963 states have internal predecessors, (72963), 0 states have call successors, (0), 0 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 15:42:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21964 states to 21964 states and 72963 transitions. [2021-06-05 15:42:05,812 INFO L78 Accepts]: Start accepts. Automaton has 21964 states and 72963 transitions. Word has length 54 [2021-06-05 15:42:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:05,812 INFO L482 AbstractCegarLoop]: Abstraction has 21964 states and 72963 transitions. [2021-06-05 15:42:05,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:42:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 21964 states and 72963 transitions. [2021-06-05 15:42:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:42:05,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:05,841 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:42:06,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:42:06,041 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash 350486487, now seen corresponding path program 53 times [2021-06-05 15:42:06,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:06,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002069072] [2021-06-05 15:42:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:42:06,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002069072] [2021-06-05 15:42:06,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002069072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749454086] [2021-06-05 15:42:06,399 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:06,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:42:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:42:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:07,091 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:42:07,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:07,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:07,100 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 15:42:07,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:42:07,185 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:07,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:42:07,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:07,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:07,190 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 15:42:07,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:42:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:07,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749454086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:07,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:07,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:42:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068932664] [2021-06-05 15:42:07,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:42:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:42:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:42:07,265 INFO L87 Difference]: Start difference. First operand 21964 states and 72963 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:42:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:15,057 INFO L93 Difference]: Finished difference Result 69919 states and 235479 transitions. [2021-06-05 15:42:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 15:42:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:42:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:15,202 INFO L225 Difference]: With dead ends: 69919 [2021-06-05 15:42:15,202 INFO L226 Difference]: Without dead ends: 68859 [2021-06-05 15:42:15,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11074 ImplicationChecksByTransitivity, 5600.6ms TimeCoverageRelationStatistics Valid=3234, Invalid=27918, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:42:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68859 states. [2021-06-05 15:42:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68859 to 22062. [2021-06-05 15:42:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 3.3209736639318255) internal successors, (73264), 22061 states have internal predecessors, (73264), 0 states have call successors, (0), 0 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 15:42:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 73264 transitions. [2021-06-05 15:42:15,843 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 73264 transitions. Word has length 54 [2021-06-05 15:42:15,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:15,843 INFO L482 AbstractCegarLoop]: Abstraction has 22062 states and 73264 transitions. [2021-06-05 15:42:15,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:42:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 73264 transitions. [2021-06-05 15:42:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:42:15,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:15,873 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:42:16,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:16,073 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:16,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1417516959, now seen corresponding path program 54 times [2021-06-05 15:42:16,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:16,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236301878] [2021-06-05 15:42:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:42:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236301878] [2021-06-05 15:42:16,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236301878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660837629] [2021-06-05 15:42:16,376 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:16,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:42:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:42:16,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:16,984 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:16,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:42:16,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:16,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:16,994 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 15:42:16,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:42:17,110 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:17,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:42:17,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:17,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:17,115 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 15:42:17,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:42:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:17,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660837629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:17,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:17,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:42:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179318935] [2021-06-05 15:42:17,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:42:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:17,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:42:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:42:17,375 INFO L87 Difference]: Start difference. First operand 22062 states and 73264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 15:42:20,503 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:42:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:29,865 INFO L93 Difference]: Finished difference Result 150720 states and 516372 transitions. [2021-06-05 15:42:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 15:42:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:42:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:30,226 INFO L225 Difference]: With dead ends: 150720 [2021-06-05 15:42:30,226 INFO L226 Difference]: Without dead ends: 145955 [2021-06-05 15:42:30,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 10104.9ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-06-05 15:42:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2021-06-05 15:42:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 25238. [2021-06-05 15:42:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25238 states, 25237 states have (on average 3.303245235170583) internal successors, (83364), 25237 states have internal predecessors, (83364), 0 states have call successors, (0), 0 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 15:42:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25238 states to 25238 states and 83364 transitions. [2021-06-05 15:42:31,499 INFO L78 Accepts]: Start accepts. Automaton has 25238 states and 83364 transitions. Word has length 54 [2021-06-05 15:42:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:31,500 INFO L482 AbstractCegarLoop]: Abstraction has 25238 states and 83364 transitions. [2021-06-05 15:42:31,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 15:42:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25238 states and 83364 transitions. [2021-06-05 15:42:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:42:31,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:31,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:42:31,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:42:31,732 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:31,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash 668210515, now seen corresponding path program 55 times [2021-06-05 15:42:31,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:31,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491393942] [2021-06-05 15:42:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:42:32,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491393942] [2021-06-05 15:42:32,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491393942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:32,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956583382] [2021-06-05 15:42:32,056 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:42:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:32,612 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:32,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:42:32,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:32,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:32,621 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 15:42:32,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:42:33,100 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:33,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:42:33,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:33,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:33,105 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 15:42:33,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:42:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:33,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956583382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:33,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:33,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:42:33,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583525551] [2021-06-05 15:42:33,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:42:33,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:42:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:33,175 INFO L87 Difference]: Start difference. First operand 25238 states and 83364 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:33,584 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-06-05 15:42:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:42:44,371 INFO L93 Difference]: Finished difference Result 105434 states and 354160 transitions. [2021-06-05 15:42:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 15:42:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:42:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:42:44,622 INFO L225 Difference]: With dead ends: 105434 [2021-06-05 15:42:44,623 INFO L226 Difference]: Without dead ends: 104584 [2021-06-05 15:42:44,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23552 ImplicationChecksByTransitivity, 9152.9ms TimeCoverageRelationStatistics Valid=5754, Invalid=53538, Unknown=0, NotChecked=0, Total=59292 [2021-06-05 15:42:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104584 states. [2021-06-05 15:42:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104584 to 26860. [2021-06-05 15:42:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26860 states, 26859 states have (on average 3.29863360512305) internal successors, (88598), 26859 states have internal predecessors, (88598), 0 states have call successors, (0), 0 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 15:42:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26860 states to 26860 states and 88598 transitions. [2021-06-05 15:42:45,752 INFO L78 Accepts]: Start accepts. Automaton has 26860 states and 88598 transitions. Word has length 54 [2021-06-05 15:42:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:42:45,752 INFO L482 AbstractCegarLoop]: Abstraction has 26860 states and 88598 transitions. [2021-06-05 15:42:45,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:42:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 26860 states and 88598 transitions. [2021-06-05 15:42:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:42:45,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:42:45,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:42:46,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 15:42:46,009 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:42:46,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:42:46,009 INFO L82 PathProgramCache]: Analyzing trace with hash 160886709, now seen corresponding path program 56 times [2021-06-05 15:42:46,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:42:46,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715191454] [2021-06-05 15:42:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:42:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:42:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:42:46,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:42:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715191454] [2021-06-05 15:42:46,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715191454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:46,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236014452] [2021-06-05 15:42:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:42:46,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:42:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:42:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:42:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:42:47,074 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:42:47,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:47,084 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 15:42:47,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:42:47,311 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:42:47,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:42:47,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:42:47,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:42:47,316 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 15:42:47,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:42:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:42:47,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236014452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:42:47,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:42:47,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:42:47,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79991204] [2021-06-05 15:42:47,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:42:47,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:42:47,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:42:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:42:47,387 INFO L87 Difference]: Start difference. First operand 26860 states and 88598 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:01,120 INFO L93 Difference]: Finished difference Result 130379 states and 438439 transitions. [2021-06-05 15:43:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-06-05 15:43:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:43:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:01,407 INFO L225 Difference]: With dead ends: 130379 [2021-06-05 15:43:01,407 INFO L226 Difference]: Without dead ends: 129369 [2021-06-05 15:43:01,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 11114.8ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-06-05 15:43:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129369 states. [2021-06-05 15:43:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129369 to 27396. [2021-06-05 15:43:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27396 states, 27395 states have (on average 3.301770396057675) internal successors, (90452), 27395 states have internal predecessors, (90452), 0 states have call successors, (0), 0 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 15:43:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27396 states to 27396 states and 90452 transitions. [2021-06-05 15:43:02,873 INFO L78 Accepts]: Start accepts. Automaton has 27396 states and 90452 transitions. Word has length 54 [2021-06-05 15:43:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:02,873 INFO L482 AbstractCegarLoop]: Abstraction has 27396 states and 90452 transitions. [2021-06-05 15:43:02,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 27396 states and 90452 transitions. [2021-06-05 15:43:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:43:02,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:02,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:43:03,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:03,119 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -757192301, now seen corresponding path program 57 times [2021-06-05 15:43:03,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:03,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202144140] [2021-06-05 15:43:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:43:03,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202144140] [2021-06-05 15:43:03,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202144140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520822949] [2021-06-05 15:43:03,468 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:03,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:43:03,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:03,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:43:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:04,124 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:43:04,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:43:04,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:04,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:04,133 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 15:43:04,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:43:04,299 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:43:04,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:43:04,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:04,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:04,305 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 15:43:04,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:43:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:04,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520822949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:04,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:04,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:43:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176111810] [2021-06-05 15:43:04,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:43:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:43:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:04,387 INFO L87 Difference]: Start difference. First operand 27396 states and 90452 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:21,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:21,067 INFO L93 Difference]: Finished difference Result 144390 states and 485662 transitions. [2021-06-05 15:43:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-06-05 15:43:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:43:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:21,621 INFO L225 Difference]: With dead ends: 144390 [2021-06-05 15:43:21,622 INFO L226 Difference]: Without dead ends: 142820 [2021-06-05 15:43:21,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 13455.9ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-06-05 15:43:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142820 states. [2021-06-05 15:43:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142820 to 27718. [2021-06-05 15:43:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27718 states, 27717 states have (on average 3.300285023631706) internal successors, (91474), 27717 states have internal predecessors, (91474), 0 states have call successors, (0), 0 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 15:43:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27718 states to 27718 states and 91474 transitions. [2021-06-05 15:43:22,980 INFO L78 Accepts]: Start accepts. Automaton has 27718 states and 91474 transitions. Word has length 54 [2021-06-05 15:43:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:22,981 INFO L482 AbstractCegarLoop]: Abstraction has 27718 states and 91474 transitions. [2021-06-05 15:43:22,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 27718 states and 91474 transitions. [2021-06-05 15:43:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:43:23,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:23,019 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:43:23,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:23,220 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash -450654615, now seen corresponding path program 58 times [2021-06-05 15:43:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:23,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349266620] [2021-06-05 15:43:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:43:23,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:23,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349266620] [2021-06-05 15:43:23,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349266620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:23,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995951718] [2021-06-05 15:43:23,526 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:23,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:43:23,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:43:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:24,156 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:43:24,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:43:24,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:24,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:24,166 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 15:43:24,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:43:24,284 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:43:24,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:43:24,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:24,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:24,289 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 15:43:24,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:43:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:24,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995951718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:24,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:24,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:43:24,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811283519] [2021-06-05 15:43:24,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:43:24,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:43:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:24,358 INFO L87 Difference]: Start difference. First operand 27718 states and 91474 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:26,151 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-06-05 15:43:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:38,516 INFO L93 Difference]: Finished difference Result 126027 states and 422969 transitions. [2021-06-05 15:43:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-05 15:43:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:43:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:38,820 INFO L225 Difference]: With dead ends: 126027 [2021-06-05 15:43:38,820 INFO L226 Difference]: Without dead ends: 125012 [2021-06-05 15:43:38,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 10268.2ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-06-05 15:43:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125012 states. [2021-06-05 15:43:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125012 to 27184. [2021-06-05 15:43:40,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27184 states, 27183 states have (on average 3.2973181768016775) internal successors, (89631), 27183 states have internal predecessors, (89631), 0 states have call successors, (0), 0 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 15:43:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27184 states to 27184 states and 89631 transitions. [2021-06-05 15:43:40,192 INFO L78 Accepts]: Start accepts. Automaton has 27184 states and 89631 transitions. Word has length 54 [2021-06-05 15:43:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:43:40,192 INFO L482 AbstractCegarLoop]: Abstraction has 27184 states and 89631 transitions. [2021-06-05 15:43:40,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 27184 states and 89631 transitions. [2021-06-05 15:43:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:43:40,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:43:40,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:43:40,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:43:40,433 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:43:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:43:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1368733625, now seen corresponding path program 59 times [2021-06-05 15:43:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:43:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129701361] [2021-06-05 15:43:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:43:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:43:40,822 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 15:43:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:43:40,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:43:40,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129701361] [2021-06-05 15:43:40,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129701361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:40,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007739367] [2021-06-05 15:43:40,864 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:43:40,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:43:40,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:43:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:43:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:43:41,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:41,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:41,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:43:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:43:41,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:43:41,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:41,545 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 15:43:41,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-06-05 15:43:41,672 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:43:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:43:41,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:43:41,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:43:41,677 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 15:43:41,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:43:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:43:41,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007739367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:43:41,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:43:41,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:43:41,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848406344] [2021-06-05 15:43:41,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:43:41,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:43:41,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:43:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:43:41,749 INFO L87 Difference]: Start difference. First operand 27184 states and 89631 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:43:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:43:58,310 INFO L93 Difference]: Finished difference Result 132631 states and 444905 transitions. [2021-06-05 15:43:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-06-05 15:43:58,310 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:43:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:43:58,619 INFO L225 Difference]: With dead ends: 132631 [2021-06-05 15:43:58,619 INFO L226 Difference]: Without dead ends: 131761 [2021-06-05 15:43:58,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39131 ImplicationChecksByTransitivity, 12934.7ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-06-05 15:43:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131761 states. [2021-06-05 15:44:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131761 to 26238. [2021-06-05 15:44:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26238 states, 26237 states have (on average 3.297976140564851) internal successors, (86529), 26237 states have internal predecessors, (86529), 0 states have call successors, (0), 0 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 15:44:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26238 states to 26238 states and 86529 transitions. [2021-06-05 15:44:00,093 INFO L78 Accepts]: Start accepts. Automaton has 26238 states and 86529 transitions. Word has length 54 [2021-06-05 15:44:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:00,093 INFO L482 AbstractCegarLoop]: Abstraction has 26238 states and 86529 transitions. [2021-06-05 15:44:00,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26238 states and 86529 transitions. [2021-06-05 15:44:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:00,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:00,130 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:44:00,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:00,331 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash -702299817, now seen corresponding path program 60 times [2021-06-05 15:44:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:00,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844782086] [2021-06-05 15:44:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 15:44:00,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844782086] [2021-06-05 15:44:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844782086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687614027] [2021-06-05 15:44:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:00,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:44:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:44:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:01,210 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 15:44:01,437 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:44:01,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:01,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:01,448 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 15:44:01,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:44:01,535 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:01,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:44:01,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:01,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:01,540 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 15:44:01,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:44:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:01,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687614027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:01,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:01,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-06-05 15:44:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653727152] [2021-06-05 15:44:01,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 15:44:01,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 15:44:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:44:01,613 INFO L87 Difference]: Start difference. First operand 26238 states and 86529 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:14,505 INFO L93 Difference]: Finished difference Result 108205 states and 362412 transitions. [2021-06-05 15:44:14,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-06-05 15:44:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:14,887 INFO L225 Difference]: With dead ends: 108205 [2021-06-05 15:44:14,887 INFO L226 Difference]: Without dead ends: 106791 [2021-06-05 15:44:14,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26754 ImplicationChecksByTransitivity, 10134.1ms TimeCoverageRelationStatistics Valid=6587, Invalid=60235, Unknown=0, NotChecked=0, Total=66822 [2021-06-05 15:44:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106791 states. [2021-06-05 15:44:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106791 to 23572. [2021-06-05 15:44:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23572 states, 23571 states have (on average 3.3202240040728013) internal successors, (78261), 23571 states have internal predecessors, (78261), 0 states have call successors, (0), 0 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 15:44:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 78261 transitions. [2021-06-05 15:44:15,858 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 78261 transitions. Word has length 54 [2021-06-05 15:44:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:15,858 INFO L482 AbstractCegarLoop]: Abstraction has 23572 states and 78261 transitions. [2021-06-05 15:44:15,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:44:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 78261 transitions. [2021-06-05 15:44:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:15,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:15,889 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:44:16,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:16,090 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1274429673, now seen corresponding path program 61 times [2021-06-05 15:44:16,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:16,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543611074] [2021-06-05 15:44:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:16,247 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 15:44:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:16,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543611074] [2021-06-05 15:44:16,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543611074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:16,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179162870] [2021-06-05 15:44:16,568 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:44:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:17,191 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:44:17,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:17,201 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 15:44:17,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:44:17,372 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:17,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:44:17,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:17,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:17,378 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 15:44:17,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:44:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:17,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179162870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:17,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:17,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:44:17,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652723764] [2021-06-05 15:44:17,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:44:17,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:44:17,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:44:17,519 INFO L87 Difference]: Start difference. First operand 23572 states and 78261 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 15:44:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:29,428 INFO L93 Difference]: Finished difference Result 101893 states and 342921 transitions. [2021-06-05 15:44:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 15:44:29,429 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:29,669 INFO L225 Difference]: With dead ends: 101893 [2021-06-05 15:44:29,670 INFO L226 Difference]: Without dead ends: 101033 [2021-06-05 15:44:29,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23364 ImplicationChecksByTransitivity, 9329.6ms TimeCoverageRelationStatistics Valid=5536, Invalid=54734, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 15:44:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101033 states. [2021-06-05 15:44:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101033 to 23904. [2021-06-05 15:44:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 3.316487470192026) internal successors, (79274), 23903 states have internal predecessors, (79274), 0 states have call successors, (0), 0 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 15:44:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 79274 transitions. [2021-06-05 15:44:30,614 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 79274 transitions. Word has length 54 [2021-06-05 15:44:30,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:30,614 INFO L482 AbstractCegarLoop]: Abstraction has 23904 states and 79274 transitions. [2021-06-05 15:44:30,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 15:44:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 79274 transitions. [2021-06-05 15:44:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:30,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:30,643 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:44:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:30,844 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1901672493, now seen corresponding path program 62 times [2021-06-05 15:44:30,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:30,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639434377] [2021-06-05 15:44:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:31,254 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-06-05 15:44:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:44:31,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:31,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639434377] [2021-06-05 15:44:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639434377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:31,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789091569] [2021-06-05 15:44:31,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:31,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:44:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:44:31,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:31,991 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:31,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:44:31,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,001 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 15:44:32,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:44:32,126 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:32,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:44:32,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:32,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:32,131 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 15:44:32,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:44:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:32,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789091569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:32,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:32,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:44:32,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5296182] [2021-06-05 15:44:32,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:44:32,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:44:32,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:44:32,205 INFO L87 Difference]: Start difference. First operand 23904 states and 79274 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 15:44:43,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:44:43,959 INFO L93 Difference]: Finished difference Result 91780 states and 309030 transitions. [2021-06-05 15:44:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 15:44:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:44:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:44:44,144 INFO L225 Difference]: With dead ends: 91780 [2021-06-05 15:44:44,144 INFO L226 Difference]: Without dead ends: 90930 [2021-06-05 15:44:44,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22028 ImplicationChecksByTransitivity, 9891.4ms TimeCoverageRelationStatistics Valid=5784, Invalid=51576, Unknown=0, NotChecked=0, Total=57360 [2021-06-05 15:44:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states. [2021-06-05 15:44:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90930 to 23990. [2021-06-05 15:44:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.311601150527325) internal successors, (79442), 23989 states have internal predecessors, (79442), 0 states have call successors, (0), 0 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 15:44:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 79442 transitions. [2021-06-05 15:44:44,955 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 79442 transitions. Word has length 54 [2021-06-05 15:44:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:44:44,955 INFO L482 AbstractCegarLoop]: Abstraction has 23990 states and 79442 transitions. [2021-06-05 15:44:44,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 15:44:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 79442 transitions. [2021-06-05 15:44:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:44:44,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:44:44,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:44:45,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:44:45,187 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:44:45,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:44:45,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1703119415, now seen corresponding path program 63 times [2021-06-05 15:44:45,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:44:45,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266247516] [2021-06-05 15:44:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:44:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:44:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 15:44:45,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:44:45,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266247516] [2021-06-05 15:44:45,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266247516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:45,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454548500] [2021-06-05 15:44:45,620 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:44:45,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:44:45,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:44:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:44:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:44:46,290 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:44:46,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:44:46,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:46,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:46,299 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 15:44:46,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:44:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:44:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:44:46,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:44:46,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:44:46,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:44:46,416 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 15:44:46,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:44:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:44:46,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454548500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:44:46,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:44:46,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-06-05 15:44:46,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508495959] [2021-06-05 15:44:46,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 15:44:46,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:44:46,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 15:44:46,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:44:46,492 INFO L87 Difference]: Start difference. First operand 23990 states and 79442 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:45:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:00,480 INFO L93 Difference]: Finished difference Result 83749 states and 282555 transitions. [2021-06-05 15:45:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-06-05 15:45:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:00,648 INFO L225 Difference]: With dead ends: 83749 [2021-06-05 15:45:00,648 INFO L226 Difference]: Without dead ends: 79687 [2021-06-05 15:45:00,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22824 ImplicationChecksByTransitivity, 10972.3ms TimeCoverageRelationStatistics Valid=5842, Invalid=52480, Unknown=0, NotChecked=0, Total=58322 [2021-06-05 15:45:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79687 states. [2021-06-05 15:45:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79687 to 24522. [2021-06-05 15:45:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24522 states, 24521 states have (on average 3.308837323110803) internal successors, (81136), 24521 states have internal predecessors, (81136), 0 states have call successors, (0), 0 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 15:45:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 81136 transitions. [2021-06-05 15:45:01,418 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 81136 transitions. Word has length 54 [2021-06-05 15:45:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:01,418 INFO L482 AbstractCegarLoop]: Abstraction has 24522 states and 81136 transitions. [2021-06-05 15:45:01,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 15:45:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 81136 transitions. [2021-06-05 15:45:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:01,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:01,451 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:45:01,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:01,651 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:01,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1112434429, now seen corresponding path program 64 times [2021-06-05 15:45:01,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:01,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427044565] [2021-06-05 15:45:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:45:02,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:02,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427044565] [2021-06-05 15:45:02,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427044565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:02,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577380724] [2021-06-05 15:45:02,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:02,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:45:02,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:02,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:45:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:02,683 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:02,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:45:02,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:02,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:02,692 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 15:45:02,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:45:02,843 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:02,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:45:02,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:02,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:02,848 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 15:45:02,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:45:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:02,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577380724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:02,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:02,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:45:02,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626791355] [2021-06-05 15:45:02,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:45:02,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:45:02,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:45:02,922 INFO L87 Difference]: Start difference. First operand 24522 states and 81136 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:15,818 INFO L93 Difference]: Finished difference Result 94684 states and 318256 transitions. [2021-06-05 15:45:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-06-05 15:45:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:16,020 INFO L225 Difference]: With dead ends: 94684 [2021-06-05 15:45:16,020 INFO L226 Difference]: Without dead ends: 93786 [2021-06-05 15:45:16,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22145 ImplicationChecksByTransitivity, 9273.6ms TimeCoverageRelationStatistics Valid=5306, Invalid=51576, Unknown=0, NotChecked=0, Total=56882 [2021-06-05 15:45:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93786 states. [2021-06-05 15:45:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93786 to 25118. [2021-06-05 15:45:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25118 states, 25117 states have (on average 3.3056495600589244) internal successors, (83028), 25117 states have internal predecessors, (83028), 0 states have call successors, (0), 0 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 15:45:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25118 states to 25118 states and 83028 transitions. [2021-06-05 15:45:16,975 INFO L78 Accepts]: Start accepts. Automaton has 25118 states and 83028 transitions. Word has length 54 [2021-06-05 15:45:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 25118 states and 83028 transitions. [2021-06-05 15:45:16,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25118 states and 83028 transitions. [2021-06-05 15:45:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:17,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:17,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:45:17,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:17,214 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:17,214 INFO L82 PathProgramCache]: Analyzing trace with hash 605110623, now seen corresponding path program 65 times [2021-06-05 15:45:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:17,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103563203] [2021-06-05 15:45:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:45:17,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:17,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103563203] [2021-06-05 15:45:17,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103563203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:17,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770724233] [2021-06-05 15:45:17,663 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:17,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:45:17,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:17,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:45:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:18,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:18,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:45:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:45:18,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:45:18,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:18,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:18,431 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 15:45:18,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:31 [2021-06-05 15:45:18,598 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:45:18,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:18,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:18,602 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 15:45:18,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:45:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:18,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770724233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:18,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:18,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:45:18,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812416868] [2021-06-05 15:45:18,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:45:18,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:45:18,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:45:18,675 INFO L87 Difference]: Start difference. First operand 25118 states and 83028 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:32,890 INFO L93 Difference]: Finished difference Result 115635 states and 388960 transitions. [2021-06-05 15:45:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-06-05 15:45:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:33,150 INFO L225 Difference]: With dead ends: 115635 [2021-06-05 15:45:33,150 INFO L226 Difference]: Without dead ends: 114631 [2021-06-05 15:45:33,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29308 ImplicationChecksByTransitivity, 11681.1ms TimeCoverageRelationStatistics Valid=7087, Invalid=66083, Unknown=0, NotChecked=0, Total=73170 [2021-06-05 15:45:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114631 states. [2021-06-05 15:45:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114631 to 25490. [2021-06-05 15:45:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 25489 states have (on average 3.3076621287614265) internal successors, (84309), 25489 states have internal predecessors, (84309), 0 states have call successors, (0), 0 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 15:45:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 84309 transitions. [2021-06-05 15:45:34,203 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 84309 transitions. Word has length 54 [2021-06-05 15:45:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:34,203 INFO L482 AbstractCegarLoop]: Abstraction has 25490 states and 84309 transitions. [2021-06-05 15:45:34,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 84309 transitions. [2021-06-05 15:45:34,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:34,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:34,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:45:34,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 15:45:34,435 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash -312968387, now seen corresponding path program 66 times [2021-06-05 15:45:34,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:34,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816008005] [2021-06-05 15:45:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:45:34,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:34,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816008005] [2021-06-05 15:45:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816008005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:34,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925087836] [2021-06-05 15:45:34,783 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:34,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:45:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:45:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:45:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:35,344 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-06-05 15:45:35,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,353 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 15:45:35,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-06-05 15:45:35,533 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:45:35,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:35,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:35,538 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 15:45:35,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:45:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925087836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:35,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:35,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:45:35,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285399029] [2021-06-05 15:45:35,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:45:35,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:45:35,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:45:35,612 INFO L87 Difference]: Start difference. First operand 25490 states and 84309 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:40,623 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-06-05 15:45:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:45:52,806 INFO L93 Difference]: Finished difference Result 126947 states and 426952 transitions. [2021-06-05 15:45:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-06-05 15:45:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:45:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:45:53,102 INFO L225 Difference]: With dead ends: 126947 [2021-06-05 15:45:53,103 INFO L226 Difference]: Without dead ends: 125608 [2021-06-05 15:45:53,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39699 ImplicationChecksByTransitivity, 13424.7ms TimeCoverageRelationStatistics Valid=8842, Invalid=86948, Unknown=0, NotChecked=0, Total=95790 [2021-06-05 15:45:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125608 states. [2021-06-05 15:45:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125608 to 25380. [2021-06-05 15:45:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 3.307064896174002) internal successors, (83930), 25379 states have internal predecessors, (83930), 0 states have call successors, (0), 0 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 15:45:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 83930 transitions. [2021-06-05 15:45:54,148 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 83930 transitions. Word has length 54 [2021-06-05 15:45:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:45:54,148 INFO L482 AbstractCegarLoop]: Abstraction has 25380 states and 83930 transitions. [2021-06-05 15:45:54,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 83930 transitions. [2021-06-05 15:45:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:45:54,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:45:54,182 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:45:54,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:54,383 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:45:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:45:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash -6430701, now seen corresponding path program 67 times [2021-06-05 15:45:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:45:54,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935925647] [2021-06-05 15:45:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:45:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:45:54,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:45:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935925647] [2021-06-05 15:45:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935925647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872970453] [2021-06-05 15:45:54,726 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:45:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:45:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:45:54,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:45:55,334 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:55,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:45:55,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,344 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 15:45:55,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:45:55,461 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:45:55,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:45:55,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:45:55,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:45:55,466 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 15:45:55,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:45:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:45:55,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872970453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:45:55,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:45:55,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:45:55,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135622744] [2021-06-05 15:45:55,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:45:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:45:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:45:55,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:45:55,537 INFO L87 Difference]: Start difference. First operand 25380 states and 83930 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:45:57,107 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-06-05 15:46:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:09,888 INFO L93 Difference]: Finished difference Result 116033 states and 390273 transitions. [2021-06-05 15:46:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-06-05 15:46:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:10,169 INFO L225 Difference]: With dead ends: 116033 [2021-06-05 15:46:10,169 INFO L226 Difference]: Without dead ends: 115155 [2021-06-05 15:46:10,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27626 ImplicationChecksByTransitivity, 10509.5ms TimeCoverageRelationStatistics Valid=6490, Invalid=62942, Unknown=0, NotChecked=0, Total=69432 [2021-06-05 15:46:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115155 states. [2021-06-05 15:46:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115155 to 25374. [2021-06-05 15:46:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25374 states, 25373 states have (on average 3.307019272454972) internal successors, (83909), 25373 states have internal predecessors, (83909), 0 states have call successors, (0), 0 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 15:46:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25374 states to 25374 states and 83909 transitions. [2021-06-05 15:46:11,210 INFO L78 Accepts]: Start accepts. Automaton has 25374 states and 83909 transitions. Word has length 54 [2021-06-05 15:46:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:11,210 INFO L482 AbstractCegarLoop]: Abstraction has 25374 states and 83909 transitions. [2021-06-05 15:46:11,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 25374 states and 83909 transitions. [2021-06-05 15:46:11,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:11,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:11,242 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:46:11,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:11,457 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash -924509711, now seen corresponding path program 68 times [2021-06-05 15:46:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:11,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440554910] [2021-06-05 15:46:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:46:12,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440554910] [2021-06-05 15:46:12,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440554910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650859213] [2021-06-05 15:46:12,061 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:12,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:46:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:12,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:46:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:12,810 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:46:12,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,820 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 15:46:12,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:46:12,941 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:12,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:46:12,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:12,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:12,947 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 15:46:12,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:46:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:13,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650859213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:13,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:13,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:46:13,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028593163] [2021-06-05 15:46:13,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:46:13,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:46:13,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:46:13,030 INFO L87 Difference]: Start difference. First operand 25374 states and 83909 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:28,833 INFO L93 Difference]: Finished difference Result 120682 states and 405497 transitions. [2021-06-05 15:46:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-06-05 15:46:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:29,111 INFO L225 Difference]: With dead ends: 120682 [2021-06-05 15:46:29,111 INFO L226 Difference]: Without dead ends: 119807 [2021-06-05 15:46:29,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37756 ImplicationChecksByTransitivity, 12852.1ms TimeCoverageRelationStatistics Valid=8417, Invalid=83089, Unknown=0, NotChecked=0, Total=91506 [2021-06-05 15:46:29,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119807 states. [2021-06-05 15:46:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119807 to 25158. [2021-06-05 15:46:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25158 states, 25157 states have (on average 3.305879079381484) internal successors, (83166), 25157 states have internal predecessors, (83166), 0 states have call successors, (0), 0 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 15:46:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25158 states to 25158 states and 83166 transitions. [2021-06-05 15:46:30,170 INFO L78 Accepts]: Start accepts. Automaton has 25158 states and 83166 transitions. Word has length 54 [2021-06-05 15:46:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:30,170 INFO L482 AbstractCegarLoop]: Abstraction has 25158 states and 83166 transitions. [2021-06-05 15:46:30,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 25158 states and 83166 transitions. [2021-06-05 15:46:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:30,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:30,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:46:30,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:30,401 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash -258075903, now seen corresponding path program 69 times [2021-06-05 15:46:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:30,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025550898] [2021-06-05 15:46:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:30,708 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 15:46:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 15:46:30,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:30,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025550898] [2021-06-05 15:46:30,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025550898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:30,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548061938] [2021-06-05 15:46:30,974 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:31,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:46:31,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:46:31,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:31,728 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:31,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:46:31,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:31,737 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 15:46:31,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:46:31,817 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:31,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:46:31,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:31,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:31,822 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 15:46:31,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:46:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:31,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548061938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:31,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:31,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:46:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246656550] [2021-06-05 15:46:31,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:46:31,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:31,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:46:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:46:31,893 INFO L87 Difference]: Start difference. First operand 25158 states and 83166 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:44,915 INFO L93 Difference]: Finished difference Result 95640 states and 320302 transitions. [2021-06-05 15:46:44,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-06-05 15:46:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:45,112 INFO L225 Difference]: With dead ends: 95640 [2021-06-05 15:46:45,112 INFO L226 Difference]: Without dead ends: 94430 [2021-06-05 15:46:45,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26277 ImplicationChecksByTransitivity, 10325.7ms TimeCoverageRelationStatistics Valid=6263, Invalid=60043, Unknown=0, NotChecked=0, Total=66306 [2021-06-05 15:46:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94430 states. [2021-06-05 15:46:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94430 to 25134. [2021-06-05 15:46:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25134 states, 25133 states have (on average 3.3059324394222735) internal successors, (83088), 25133 states have internal predecessors, (83088), 0 states have call successors, (0), 0 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 15:46:45,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25134 states to 25134 states and 83088 transitions. [2021-06-05 15:46:45,969 INFO L78 Accepts]: Start accepts. Automaton has 25134 states and 83088 transitions. Word has length 54 [2021-06-05 15:46:45,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:45,969 INFO L482 AbstractCegarLoop]: Abstraction has 25134 states and 83088 transitions. [2021-06-05 15:46:45,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25134 states and 83088 transitions. [2021-06-05 15:46:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:46,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:46,001 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:46:46,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 15:46:46,202 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:46,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1981468115, now seen corresponding path program 70 times [2021-06-05 15:46:46,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:46,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943341058] [2021-06-05 15:46:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:46:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 15:46:46,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:46:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943341058] [2021-06-05 15:46:46,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943341058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:46,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816271734] [2021-06-05 15:46:46,560 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:46:46,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:46:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:46:46,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:46:46,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:46:47,289 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:47,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:46:47,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:47,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:47,299 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 15:46:47,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:46:47,377 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:46:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:46:47,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:46:47,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:46:47,382 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 15:46:47,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:46:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:46:47,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816271734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:46:47,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:46:47,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-06-05 15:46:47,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296351835] [2021-06-05 15:46:47,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:46:47,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:46:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:46:47,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:46:47,453 INFO L87 Difference]: Start difference. First operand 25134 states and 83088 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:46:58,542 INFO L93 Difference]: Finished difference Result 86306 states and 290216 transitions. [2021-06-05 15:46:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-06-05 15:46:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:46:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:46:58,713 INFO L225 Difference]: With dead ends: 86306 [2021-06-05 15:46:58,714 INFO L226 Difference]: Without dead ends: 82314 [2021-06-05 15:46:58,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19453 ImplicationChecksByTransitivity, 8753.8ms TimeCoverageRelationStatistics Valid=5086, Invalid=44866, Unknown=0, NotChecked=0, Total=49952 [2021-06-05 15:46:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82314 states. [2021-06-05 15:46:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82314 to 25752. [2021-06-05 15:46:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25752 states, 25751 states have (on average 3.303522193312881) internal successors, (85069), 25751 states have internal predecessors, (85069), 0 states have call successors, (0), 0 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 15:46:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25752 states to 25752 states and 85069 transitions. [2021-06-05 15:46:59,542 INFO L78 Accepts]: Start accepts. Automaton has 25752 states and 85069 transitions. Word has length 54 [2021-06-05 15:46:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:46:59,542 INFO L482 AbstractCegarLoop]: Abstraction has 25752 states and 85069 transitions. [2021-06-05 15:46:59,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 15:46:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 25752 states and 85069 transitions. [2021-06-05 15:46:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:46:59,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:46:59,580 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:46:59,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 15:46:59,780 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:46:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:46:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1676107171, now seen corresponding path program 71 times [2021-06-05 15:46:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:46:59,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432581058] [2021-06-05 15:46:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:46:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 15:47:00,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432581058] [2021-06-05 15:47:00,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432581058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:00,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538199637] [2021-06-05 15:47:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:00,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:47:00,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:00,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 15:47:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:00,804 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:47:00,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:00,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:00,813 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 15:47:00,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-06-05 15:47:00,892 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:00,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:47:00,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:00,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:00,896 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 15:47:00,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:47:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:00,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538199637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:00,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:00,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:47:00,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011630544] [2021-06-05 15:47:00,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:47:00,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:47:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:47:00,985 INFO L87 Difference]: Start difference. First operand 25752 states and 85069 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:47:08,145 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 15:47:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:13,351 INFO L93 Difference]: Finished difference Result 97493 states and 327125 transitions. [2021-06-05 15:47:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-06-05 15:47:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:13,548 INFO L225 Difference]: With dead ends: 97493 [2021-06-05 15:47:13,548 INFO L226 Difference]: Without dead ends: 93309 [2021-06-05 15:47:13,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27532 ImplicationChecksByTransitivity, 10208.1ms TimeCoverageRelationStatistics Valid=6915, Invalid=60425, Unknown=0, NotChecked=0, Total=67340 [2021-06-05 15:47:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93309 states. [2021-06-05 15:47:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93309 to 25720. [2021-06-05 15:47:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25720 states, 25719 states have (on average 3.3054551110074266) internal successors, (85013), 25719 states have internal predecessors, (85013), 0 states have call successors, (0), 0 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 15:47:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25720 states to 25720 states and 85013 transitions. [2021-06-05 15:47:14,378 INFO L78 Accepts]: Start accepts. Automaton has 25720 states and 85013 transitions. Word has length 54 [2021-06-05 15:47:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:14,378 INFO L482 AbstractCegarLoop]: Abstraction has 25720 states and 85013 transitions. [2021-06-05 15:47:14,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 15:47:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 25720 states and 85013 transitions. [2021-06-05 15:47:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:14,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:14,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:47:14,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:47:14,620 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1736363597, now seen corresponding path program 72 times [2021-06-05 15:47:14,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:14,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448339990] [2021-06-05 15:47:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:47:15,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:15,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448339990] [2021-06-05 15:47:15,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448339990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:15,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43063197] [2021-06-05 15:47:15,000 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:15,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:47:15,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:47:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:15,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:47:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:47:15,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:15,742 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 15:47:15,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:42 [2021-06-05 15:47:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:47:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:47:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:47:15,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:15,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:15,856 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 15:47:15,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-06-05 15:47:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:15,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43063197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:15,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:15,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-06-05 15:47:15,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273337594] [2021-06-05 15:47:15,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:47:15,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:15,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:47:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:47:15,934 INFO L87 Difference]: Start difference. First operand 25720 states and 85013 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 15:47:17,055 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-05 15:47:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:28,389 INFO L93 Difference]: Finished difference Result 111560 states and 377221 transitions. [2021-06-05 15:47:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-06-05 15:47:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:28,673 INFO L225 Difference]: With dead ends: 111560 [2021-06-05 15:47:28,673 INFO L226 Difference]: Without dead ends: 106928 [2021-06-05 15:47:28,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23672 ImplicationChecksByTransitivity, 9659.7ms TimeCoverageRelationStatistics Valid=6280, Invalid=53500, Unknown=0, NotChecked=0, Total=59780 [2021-06-05 15:47:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106928 states. [2021-06-05 15:47:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106928 to 28580. [2021-06-05 15:47:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28580 states, 28579 states have (on average 3.298120997935547) internal successors, (94257), 28579 states have internal predecessors, (94257), 0 states have call successors, (0), 0 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 15:47:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28580 states to 28580 states and 94257 transitions. [2021-06-05 15:47:29,954 INFO L78 Accepts]: Start accepts. Automaton has 28580 states and 94257 transitions. Word has length 54 [2021-06-05 15:47:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:29,954 INFO L482 AbstractCegarLoop]: Abstraction has 28580 states and 94257 transitions. [2021-06-05 15:47:29,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 15:47:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28580 states and 94257 transitions. [2021-06-05 15:47:29,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:29,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:29,993 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:47:30,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:30,193 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1006256589, now seen corresponding path program 73 times [2021-06-05 15:47:30,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:30,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526245209] [2021-06-05 15:47:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:47:30,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526245209] [2021-06-05 15:47:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526245209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:30,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794064357] [2021-06-05 15:47:30,590 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:47:30,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:31,253 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:31,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:47:31,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:31,263 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 15:47:31,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:47:31,391 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:31,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:47:31,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:31,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:31,396 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 15:47:31,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:47:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:31,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794064357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:31,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:31,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2021-06-05 15:47:31,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233474744] [2021-06-05 15:47:31,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 15:47:31,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:31,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 15:47:31,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:47:31,472 INFO L87 Difference]: Start difference. First operand 28580 states and 94257 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 15:47:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:47:45,253 INFO L93 Difference]: Finished difference Result 139761 states and 476557 transitions. [2021-06-05 15:47:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-06-05 15:47:45,253 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:47:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:47:45,592 INFO L225 Difference]: With dead ends: 139761 [2021-06-05 15:47:45,592 INFO L226 Difference]: Without dead ends: 135849 [2021-06-05 15:47:45,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31550 ImplicationChecksByTransitivity, 10699.3ms TimeCoverageRelationStatistics Valid=7909, Invalid=69653, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 15:47:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135849 states. [2021-06-05 15:47:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135849 to 29800. [2021-06-05 15:47:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29800 states, 29799 states have (on average 3.3014195107218365) internal successors, (98379), 29799 states have internal predecessors, (98379), 0 states have call successors, (0), 0 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 15:47:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29800 states to 29800 states and 98379 transitions. [2021-06-05 15:47:47,191 INFO L78 Accepts]: Start accepts. Automaton has 29800 states and 98379 transitions. Word has length 54 [2021-06-05 15:47:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:47:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 29800 states and 98379 transitions. [2021-06-05 15:47:47,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 15:47:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 29800 states and 98379 transitions. [2021-06-05 15:47:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:47:47,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:47:47,249 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:47:47,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:47,450 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:47:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:47:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash 161882491, now seen corresponding path program 74 times [2021-06-05 15:47:47,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:47:47,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210346049] [2021-06-05 15:47:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:47:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:47:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:47:47,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:47:47,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210346049] [2021-06-05 15:47:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210346049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:47,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639742685] [2021-06-05 15:47:47,975 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:47:48,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:47:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:47:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:47:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:47:48,647 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:47:48,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:48,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:48,660 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 15:47:48,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-06-05 15:47:48,792 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:47:48,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:47:48,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:47:48,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:47:48,797 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 15:47:48,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:47:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:47:48,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639742685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:47:48,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:47:48,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2021-06-05 15:47:48,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349382653] [2021-06-05 15:47:48,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 15:47:48,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:47:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 15:47:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:47:48,872 INFO L87 Difference]: Start difference. First operand 29800 states and 98379 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 15:48:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:48:04,315 INFO L93 Difference]: Finished difference Result 150008 states and 507924 transitions. [2021-06-05 15:48:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-06-05 15:48:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:48:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:48:04,841 INFO L225 Difference]: With dead ends: 150008 [2021-06-05 15:48:04,841 INFO L226 Difference]: Without dead ends: 144407 [2021-06-05 15:48:04,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35935 ImplicationChecksByTransitivity, 11879.3ms TimeCoverageRelationStatistics Valid=9234, Invalid=76908, Unknown=0, NotChecked=0, Total=86142 [2021-06-05 15:48:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144407 states. [2021-06-05 15:48:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144407 to 36010. [2021-06-05 15:48:06,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36010 states, 36009 states have (on average 3.2882890388513983) internal successors, (118408), 36009 states have internal predecessors, (118408), 0 states have call successors, (0), 0 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 15:48:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36010 states to 36010 states and 118408 transitions. [2021-06-05 15:48:06,490 INFO L78 Accepts]: Start accepts. Automaton has 36010 states and 118408 transitions. Word has length 54 [2021-06-05 15:48:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:48:06,490 INFO L482 AbstractCegarLoop]: Abstraction has 36010 states and 118408 transitions. [2021-06-05 15:48:06,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 15:48:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36010 states and 118408 transitions. [2021-06-05 15:48:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:48:06,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:48:06,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-06-05 15:48:06,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 15:48:06,743 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:48:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:48:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 256950145, now seen corresponding path program 75 times [2021-06-05 15:48:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:48:06,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641727638] [2021-06-05 15:48:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:48:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:48:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:07,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:48:07,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641727638] [2021-06-05 15:48:07,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641727638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:07,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679955089] [2021-06-05 15:48:07,182 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:07,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:48:07,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:48:07,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:48:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:48:07,910 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:48:07,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:48:07,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:07,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:07,919 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 15:48:07,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-06-05 15:48:08,087 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:48:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-06-05 15:48:08,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:48:08,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:48:08,091 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 15:48:08,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-06-05 15:48:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:48:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679955089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:48:08,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:48:08,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 48 [2021-06-05 15:48:08,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119593831] [2021-06-05 15:48:08,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:48:08,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:48:08,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:48:08,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:48:08,168 INFO L87 Difference]: Start difference. First operand 36010 states and 118408 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:48:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-06-05 15:48:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:48:17,028 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:48:17,030 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:48:17,031 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:48:17,031 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:48:17 BasicIcfg [2021-06-05 15:48:17,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:48:17,032 INFO L168 Benchmark]: Toolchain (without parser) took 766920.26 ms. Allocated memory was 335.5 MB in the beginning and 6.9 GB in the end (delta: 6.6 GB). Free memory was 314.7 MB in the beginning and 3.6 GB in the end (delta: -3.3 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 335.5 MB. Free memory is still 315.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 335.5 MB. Free memory was 314.6 MB in the beginning and 313.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L168 Benchmark]: Boogie Preprocessor took 18.69 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 312.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L168 Benchmark]: RCFGBuilder took 241.69 ms. Allocated memory is still 335.5 MB. Free memory was 312.1 MB in the beginning and 296.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L168 Benchmark]: TraceAbstraction took 766634.28 ms. Allocated memory was 335.5 MB in the beginning and 6.9 GB in the end (delta: 6.6 GB). Free memory was 296.4 MB in the beginning and 3.6 GB in the end (delta: -3.4 GB). Peak memory consumption was 3.2 GB. Max. memory is 16.0 GB. [2021-06-05 15:48:17,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 335.5 MB. Free memory is still 315.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.52 ms. Allocated memory is still 335.5 MB. Free memory was 314.6 MB in the beginning and 313.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.69 ms. Allocated memory is still 335.5 MB. Free memory was 313.1 MB in the beginning and 312.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 241.69 ms. Allocated memory is still 335.5 MB. Free memory was 312.1 MB in the beginning and 296.9 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 766634.28 ms. Allocated memory was 335.5 MB in the beginning and 6.9 GB in the end (delta: 6.6 GB). Free memory was 296.4 MB in the beginning and 3.6 GB in the end (delta: -3.4 GB). Peak memory consumption was 3.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (36010states) and FLOYD_HOARE automaton (currently 158 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (52724 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (36010states) and FLOYD_HOARE automaton (currently 158 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (52724 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (36010states) and FLOYD_HOARE automaton (currently 158 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (52724 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (36010states) and FLOYD_HOARE automaton (currently 158 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (52724 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (36010states) and FLOYD_HOARE automaton (currently 158 states, 48 states before enhancement),while ReachableStatesComputation was computing reachable states (52724 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 766560.2ms, OverallIterations: 79, TraceHistogramMax: 3, EmptinessCheckTime: 1546.4ms, AutomataDifference: 625589.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 98.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7951 SDtfs, 94467 SDslu, 154450 SDs, 0 SdLazy, 318069 SolverSat, 28616 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 134242.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16201 GetRequests, 2475 SyntacticMatches, 154 SemanticMatches, 13572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174660 ImplicationChecksByTransitivity, 478400.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36010occurred in iteration=78, InterpolantAutomatonStates: 10994, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46840.1ms AutomataMinimizationTime, 78 MinimizatonAttempts, 3834114 StatesRemovedByMinimization, 74 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 442.9ms SsaConstructionTime, 1641.2ms SatisfiabilityAnalysisTime, 73137.6ms InterpolantComputationTime, 7438 NumberOfCodeBlocks, 7438 NumberOfCodeBlocksAsserted, 295 NumberOfCheckSat, 7284 ConstructedInterpolants, 52 QuantifiedInterpolants, 113317 SizeOfPredicates, 794 NumberOfNonLiveVariables, 10024 ConjunctsInSsa, 2614 ConjunctsInUnsatCore, 154 InterpolantComputations, 6 PerfectInterpolantSequences, 1063/4127 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown