/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:33:03,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:33:03,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:33:03,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:33:03,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 20:33:03,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:33:03,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:33:03,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:33:03,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:33:03,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:33:03,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:33:03,252 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:33:03,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:33:03,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:33:03,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:33:03,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:33:03,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:33:03,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:33:03,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:33:03,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:33:03,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:33:03,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:33:03,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:33:03,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:33:03,583 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:33:03,584 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:33:03,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-05-21 20:33:03,584 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-05-21 20:33:03,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:33:03,622 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:33:03,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:33:03,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:33:03,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:33:03,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:33:03,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:33:03,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:33:03,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:33:03,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... [2021-05-21 20:33:03,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:33:03,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:33:03,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:33:03,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:33:03,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:33:03,725 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:33:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:33:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:33:03,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:33:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:33:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:33:03,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:33:03,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:33:03,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:33:03,726 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:33:03,727 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:33:03,727 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:33:03,727 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:33:03,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:33:03,896 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:33:03,897 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:33:03 BoogieIcfgContainer [2021-05-21 20:33:03,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:33:03,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:33:03,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:33:03,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:33:03,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:33:03" (1/2) ... [2021-05-21 20:33:03,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3426290d and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:33:03, skipping insertion in model container [2021-05-21 20:33:03,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:33:03" (2/2) ... [2021-05-21 20:33:03,903 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-05-21 20:33:03,907 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:33:03,907 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:33:03,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:33:03,908 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:33:03,944 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 20:33:03,962 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 20:33:03,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:33:03,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:33:03,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:33:03,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:33:03,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:33:03,985 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:33:03,985 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:33:03,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:33:04,005 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-05-21 20:33:04,025 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 20:33:04,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:04,035 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:04,035 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-05-21 20:33:04,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:04,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393633458] [2021-05-21 20:33:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393633458] [2021-05-21 20:33:04,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393633458] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:04,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:04,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 20:33:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86781343] [2021-05-21 20:33:04,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:33:04,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:33:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:33:04,340 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:04,384 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-05-21 20:33:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:33:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 20:33:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:04,402 INFO L225 Difference]: With dead ends: 214 [2021-05-21 20:33:04,402 INFO L226 Difference]: Without dead ends: 199 [2021-05-21 20:33:04,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:33:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-21 20:33:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-05-21 20:33:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-05-21 20:33:04,472 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-05-21 20:33:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:04,472 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-05-21 20:33:04,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:04,473 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-05-21 20:33:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:04,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:04,474 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:04,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:33:04,475 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-05-21 20:33:04,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:04,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075113634] [2021-05-21 20:33:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:04,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075113634] [2021-05-21 20:33:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075113634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463137027] [2021-05-21 20:33:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 20:33:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:04,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463137027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:04,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:04,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2021-05-21 20:33:04,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876988351] [2021-05-21 20:33:04,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:33:04,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:04,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:33:04,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:33:04,809 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,034 INFO L93 Difference]: Finished difference Result 468 states and 1303 transitions. [2021-05-21 20:33:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:33:05,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:05,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,039 INFO L225 Difference]: With dead ends: 468 [2021-05-21 20:33:05,040 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 20:33:05,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 20:33:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 173. [2021-05-21 20:33:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-05-21 20:33:05,071 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-05-21 20:33:05,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,072 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-05-21 20:33:05,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-05-21 20:33:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:05,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 20:33:05,293 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-05-21 20:33:05,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599310824] [2021-05-21 20:33:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599310824] [2021-05-21 20:33:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599310824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:05,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:05,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:33:05,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703401394] [2021-05-21 20:33:05,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:33:05,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:33:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:33:05,363 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,403 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-05-21 20:33:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:33:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,407 INFO L225 Difference]: With dead ends: 283 [2021-05-21 20:33:05,407 INFO L226 Difference]: Without dead ends: 283 [2021-05-21 20:33:05,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-21 20:33:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-05-21 20:33:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-05-21 20:33:05,414 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-05-21 20:33:05,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,414 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-05-21 20:33:05,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-05-21 20:33:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:05,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:33:05,416 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,416 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-05-21 20:33:05,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653334206] [2021-05-21 20:33:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653334206] [2021-05-21 20:33:05,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653334206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:05,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:05,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:05,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090941438] [2021-05-21 20:33:05,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:05,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:05,452 INFO L87 Difference]: Start difference. First operand 180 states and 536 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,499 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-05-21 20:33:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:33:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,502 INFO L225 Difference]: With dead ends: 339 [2021-05-21 20:33:05,502 INFO L226 Difference]: Without dead ends: 339 [2021-05-21 20:33:05,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:33:05,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-21 20:33:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-05-21 20:33:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-05-21 20:33:05,508 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-05-21 20:33:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,508 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-05-21 20:33:05,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-05-21 20:33:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:05,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,509 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:33:05,509 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-05-21 20:33:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715608024] [2021-05-21 20:33:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715608024] [2021-05-21 20:33:05,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715608024] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:05,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:05,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:05,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176021897] [2021-05-21 20:33:05,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:05,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:05,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:05,545 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:05,646 INFO L93 Difference]: Finished difference Result 253 states and 691 transitions. [2021-05-21 20:33:05,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:33:05,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:05,648 INFO L225 Difference]: With dead ends: 253 [2021-05-21 20:33:05,648 INFO L226 Difference]: Without dead ends: 242 [2021-05-21 20:33:05,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-21 20:33:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 175. [2021-05-21 20:33:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.8620689655172415) internal successors, (498), 174 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 498 transitions. [2021-05-21 20:33:05,655 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 498 transitions. Word has length 17 [2021-05-21 20:33:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:05,655 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 498 transitions. [2021-05-21 20:33:05,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 498 transitions. [2021-05-21 20:33:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:05,656 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:05,656 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:05,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:33:05,657 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 2 times [2021-05-21 20:33:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340152892] [2021-05-21 20:33:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:05,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340152892] [2021-05-21 20:33:05,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340152892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219095084] [2021-05-21 20:33:05,720 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 [2021-05-21 20:33:05,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:05,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:05,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219095084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:05,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:05,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-05-21 20:33:05,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598801332] [2021-05-21 20:33:05,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:33:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:05,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:33:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:33:05,860 INFO L87 Difference]: Start difference. First operand 175 states and 498 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,168 INFO L93 Difference]: Finished difference Result 429 states and 1177 transitions. [2021-05-21 20:33:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,170 INFO L225 Difference]: With dead ends: 429 [2021-05-21 20:33:06,171 INFO L226 Difference]: Without dead ends: 429 [2021-05-21 20:33:06,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:33:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-21 20:33:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 185. [2021-05-21 20:33:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9184782608695654) internal successors, (537), 184 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 537 transitions. [2021-05-21 20:33:06,179 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 537 transitions. Word has length 17 [2021-05-21 20:33:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,179 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 537 transitions. [2021-05-21 20:33:06,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 537 transitions. [2021-05-21 20:33:06,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:06,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,180 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:06,397 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-05-21 20:33:06,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46061444] [2021-05-21 20:33:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46061444] [2021-05-21 20:33:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46061444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:06,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:06,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262548206] [2021-05-21 20:33:06,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:06,445 INFO L87 Difference]: Start difference. First operand 185 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,520 INFO L93 Difference]: Finished difference Result 300 states and 817 transitions. [2021-05-21 20:33:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:33:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,522 INFO L225 Difference]: With dead ends: 300 [2021-05-21 20:33:06,523 INFO L226 Difference]: Without dead ends: 296 [2021-05-21 20:33:06,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:33:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-21 20:33:06,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 191. [2021-05-21 20:33:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-05-21 20:33:06,531 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-05-21 20:33:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,532 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-05-21 20:33:06,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-05-21 20:33:06,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:06,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:33:06,533 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1386380322, now seen corresponding path program 3 times [2021-05-21 20:33:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951926196] [2021-05-21 20:33:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951926196] [2021-05-21 20:33:06,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951926196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:06,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:06,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:06,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600285054] [2021-05-21 20:33:06,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:06,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:06,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:06,579 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,705 INFO L93 Difference]: Finished difference Result 305 states and 826 transitions. [2021-05-21 20:33:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,708 INFO L225 Difference]: With dead ends: 305 [2021-05-21 20:33:06,708 INFO L226 Difference]: Without dead ends: 294 [2021-05-21 20:33:06,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:06,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-21 20:33:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2021-05-21 20:33:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.8877551020408165) internal successors, (566), 196 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 566 transitions. [2021-05-21 20:33:06,716 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 566 transitions. Word has length 17 [2021-05-21 20:33:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,716 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 566 transitions. [2021-05-21 20:33:06,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 566 transitions. [2021-05-21 20:33:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:06,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,717 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-21 20:33:06,718 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1009070818, now seen corresponding path program 4 times [2021-05-21 20:33:06,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654482883] [2021-05-21 20:33:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654482883] [2021-05-21 20:33:06,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654482883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:06,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:06,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:06,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498501413] [2021-05-21 20:33:06,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:06,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:06,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:06,748 INFO L87 Difference]: Start difference. First operand 197 states and 566 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,885 INFO L93 Difference]: Finished difference Result 285 states and 789 transitions. [2021-05-21 20:33:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 20:33:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,888 INFO L225 Difference]: With dead ends: 285 [2021-05-21 20:33:06,888 INFO L226 Difference]: Without dead ends: 285 [2021-05-21 20:33:06,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-21 20:33:06,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-05-21 20:33:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.896039603960396) internal successors, (585), 202 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 585 transitions. [2021-05-21 20:33:06,894 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 585 transitions. Word has length 17 [2021-05-21 20:33:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,894 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 585 transitions. [2021-05-21 20:33:06,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 585 transitions. [2021-05-21 20:33:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:06,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 20:33:06,895 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,896 INFO L82 PathProgramCache]: Analyzing trace with hash -683037018, now seen corresponding path program 2 times [2021-05-21 20:33:06,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156678760] [2021-05-21 20:33:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:06,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:06,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156678760] [2021-05-21 20:33:06,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156678760] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:33:06,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:33:06,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:33:06,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828476440] [2021-05-21 20:33:06,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:33:06,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:06,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:33:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:33:06,921 INFO L87 Difference]: Start difference. First operand 203 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:06,980 INFO L93 Difference]: Finished difference Result 251 states and 716 transitions. [2021-05-21 20:33:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:33:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:06,982 INFO L225 Difference]: With dead ends: 251 [2021-05-21 20:33:06,982 INFO L226 Difference]: Without dead ends: 243 [2021-05-21 20:33:06,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:33:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-21 20:33:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 193. [2021-05-21 20:33:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.8958333333333335) internal successors, (556), 192 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 556 transitions. [2021-05-21 20:33:06,987 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 556 transitions. Word has length 17 [2021-05-21 20:33:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:06,988 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 556 transitions. [2021-05-21 20:33:06,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 556 transitions. [2021-05-21 20:33:06,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:06,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:06,989 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:06,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-21 20:33:06,989 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:06,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 5 times [2021-05-21 20:33:06,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:06,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873586367] [2021-05-21 20:33:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873586367] [2021-05-21 20:33:07,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873586367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291606503] [2021-05-21 20:33:07,033 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:07,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291606503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:07,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:07,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503653312] [2021-05-21 20:33:07,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:07,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:07,186 INFO L87 Difference]: Start difference. First operand 193 states and 556 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:07,415 INFO L93 Difference]: Finished difference Result 357 states and 1012 transitions. [2021-05-21 20:33:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:33:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:07,418 INFO L225 Difference]: With dead ends: 357 [2021-05-21 20:33:07,418 INFO L226 Difference]: Without dead ends: 357 [2021-05-21 20:33:07,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-21 20:33:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 189. [2021-05-21 20:33:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-05-21 20:33:07,424 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-05-21 20:33:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:07,424 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-05-21 20:33:07,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-05-21 20:33:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:33:07,425 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:07,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:07,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-21 20:33:07,641 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 6 times [2021-05-21 20:33:07,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:07,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025520230] [2021-05-21 20:33:07,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025520230] [2021-05-21 20:33:07,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025520230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622126746] [2021-05-21 20:33:07,684 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:07,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:07,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:07,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:07,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622126746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:07,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:07,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457186101] [2021-05-21 20:33:07,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:07,819 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:08,022 INFO L93 Difference]: Finished difference Result 311 states and 903 transitions. [2021-05-21 20:33:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:33:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:33:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:08,027 INFO L225 Difference]: With dead ends: 311 [2021-05-21 20:33:08,027 INFO L226 Difference]: Without dead ends: 311 [2021-05-21 20:33:08,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-21 20:33:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 168. [2021-05-21 20:33:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-05-21 20:33:08,046 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-05-21 20:33:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:08,046 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-05-21 20:33:08,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-05-21 20:33:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:08,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:08,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:08,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:08,248 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1253760644, now seen corresponding path program 1 times [2021-05-21 20:33:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:08,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931298151] [2021-05-21 20:33:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:08,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931298151] [2021-05-21 20:33:08,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931298151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49385590] [2021-05-21 20:33:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-21 20:33:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:08,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49385590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:08,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:08,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293325918] [2021-05-21 20:33:08,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:08,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:08,415 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:08,521 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2021-05-21 20:33:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:33:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 20:33:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:08,524 INFO L225 Difference]: With dead ends: 554 [2021-05-21 20:33:08,524 INFO L226 Difference]: Without dead ends: 524 [2021-05-21 20:33:08,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-05-21 20:33:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2021-05-21 20:33:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2021-05-21 20:33:08,535 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2021-05-21 20:33:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:08,536 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2021-05-21 20:33:08,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2021-05-21 20:33:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 20:33:08,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:08,537 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:08,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 20:33:08,745 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash -346541578, now seen corresponding path program 2 times [2021-05-21 20:33:08,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:08,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444083235] [2021-05-21 20:33:08,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:08,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444083235] [2021-05-21 20:33:08,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444083235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064989423] [2021-05-21 20:33:08,803 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:08,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:08,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:08,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064989423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:08,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:08,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:08,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847162320] [2021-05-21 20:33:08,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:08,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:08,936 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:09,014 INFO L93 Difference]: Finished difference Result 707 states and 2108 transitions. [2021-05-21 20:33:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:33:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 20:33:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:09,018 INFO L225 Difference]: With dead ends: 707 [2021-05-21 20:33:09,018 INFO L226 Difference]: Without dead ends: 662 [2021-05-21 20:33:09,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:33:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-21 20:33:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 412. [2021-05-21 20:33:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.1800486618004866) internal successors, (1307), 411 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1307 transitions. [2021-05-21 20:33:09,032 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1307 transitions. Word has length 19 [2021-05-21 20:33:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:09,032 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1307 transitions. [2021-05-21 20:33:09,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1307 transitions. [2021-05-21 20:33:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:09,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:09,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:09,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:09,256 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash -233680794, now seen corresponding path program 3 times [2021-05-21 20:33:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:09,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584505535] [2021-05-21 20:33:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:09,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584505535] [2021-05-21 20:33:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584505535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259918505] [2021-05-21 20:33:09,308 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:09,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:09,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:09,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259918505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:09,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476208837] [2021-05-21 20:33:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:09,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:09,425 INFO L87 Difference]: Start difference. First operand 412 states and 1307 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:09,690 INFO L93 Difference]: Finished difference Result 1001 states and 3011 transitions. [2021-05-21 20:33:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:09,695 INFO L225 Difference]: With dead ends: 1001 [2021-05-21 20:33:09,696 INFO L226 Difference]: Without dead ends: 1001 [2021-05-21 20:33:09,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:33:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-05-21 20:33:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 544. [2021-05-21 20:33:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 3.296500920810313) internal successors, (1790), 543 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1790 transitions. [2021-05-21 20:33:09,714 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1790 transitions. Word has length 21 [2021-05-21 20:33:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:09,715 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1790 transitions. [2021-05-21 20:33:09,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1790 transitions. [2021-05-21 20:33:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:09,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:09,716 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] [2021-05-21 20:33:09,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 20:33:09,939 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-05-21 20:33:09,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:09,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787380472] [2021-05-21 20:33:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:09,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787380472] [2021-05-21 20:33:09,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787380472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:09,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906764475] [2021-05-21 20:33:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906764475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:10,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:10,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259364071] [2021-05-21 20:33:10,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:10,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:10,156 INFO L87 Difference]: Start difference. First operand 544 states and 1790 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:10,566 INFO L93 Difference]: Finished difference Result 1180 states and 3710 transitions. [2021-05-21 20:33:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:33:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:10,572 INFO L225 Difference]: With dead ends: 1180 [2021-05-21 20:33:10,572 INFO L226 Difference]: Without dead ends: 1180 [2021-05-21 20:33:10,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:10,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-05-21 20:33:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 666. [2021-05-21 20:33:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.299248120300752) internal successors, (2194), 665 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2194 transitions. [2021-05-21 20:33:10,595 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2194 transitions. Word has length 21 [2021-05-21 20:33:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:10,595 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2194 transitions. [2021-05-21 20:33:10,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2194 transitions. [2021-05-21 20:33:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:10,597 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:10,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:10,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 20:33:10,819 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1584655390, now seen corresponding path program 4 times [2021-05-21 20:33:10,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:10,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323047316] [2021-05-21 20:33:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:10,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323047316] [2021-05-21 20:33:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323047316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826130942] [2021-05-21 20:33:10,859 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:10,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:10,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826130942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:11,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:11,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943314383] [2021-05-21 20:33:11,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:11,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:11,023 INFO L87 Difference]: Start difference. First operand 666 states and 2194 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:11,457 INFO L93 Difference]: Finished difference Result 1002 states and 3098 transitions. [2021-05-21 20:33:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:11,462 INFO L225 Difference]: With dead ends: 1002 [2021-05-21 20:33:11,462 INFO L226 Difference]: Without dead ends: 977 [2021-05-21 20:33:11,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-21 20:33:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 713. [2021-05-21 20:33:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.289325842696629) internal successors, (2342), 712 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2342 transitions. [2021-05-21 20:33:11,482 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2342 transitions. Word has length 21 [2021-05-21 20:33:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:11,482 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2342 transitions. [2021-05-21 20:33:11,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2342 transitions. [2021-05-21 20:33:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:11,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:11,484 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:11,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:33:11,707 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 5 times [2021-05-21 20:33:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:11,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637041023] [2021-05-21 20:33:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:11,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637041023] [2021-05-21 20:33:11,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637041023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362286602] [2021-05-21 20:33:11,749 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:11,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:11,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362286602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:11,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:11,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:11,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107450579] [2021-05-21 20:33:11,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:11,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:11,909 INFO L87 Difference]: Start difference. First operand 713 states and 2342 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:12,788 INFO L93 Difference]: Finished difference Result 1926 states and 5690 transitions. [2021-05-21 20:33:12,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:33:12,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:12,798 INFO L225 Difference]: With dead ends: 1926 [2021-05-21 20:33:12,798 INFO L226 Difference]: Without dead ends: 1926 [2021-05-21 20:33:12,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:33:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-21 20:33:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 812. [2021-05-21 20:33:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.347718865598027) internal successors, (2715), 811 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2715 transitions. [2021-05-21 20:33:12,830 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2715 transitions. Word has length 21 [2021-05-21 20:33:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:12,830 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2715 transitions. [2021-05-21 20:33:12,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2715 transitions. [2021-05-21 20:33:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:12,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:12,832 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] [2021-05-21 20:33:13,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 20:33:13,053 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:13,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-05-21 20:33:13,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:13,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420763799] [2021-05-21 20:33:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:13,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420763799] [2021-05-21 20:33:13,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420763799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186437766] [2021-05-21 20:33:13,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:13,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:13,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:13,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186437766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:13,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:13,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:13,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023858067] [2021-05-21 20:33:13,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:13,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:13,224 INFO L87 Difference]: Start difference. First operand 812 states and 2715 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:13,630 INFO L93 Difference]: Finished difference Result 2526 states and 7927 transitions. [2021-05-21 20:33:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:33:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:13,643 INFO L225 Difference]: With dead ends: 2526 [2021-05-21 20:33:13,643 INFO L226 Difference]: Without dead ends: 2518 [2021-05-21 20:33:13,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-05-21 20:33:13,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1045. [2021-05-21 20:33:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.4300766283524906) internal successors, (3581), 1044 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3581 transitions. [2021-05-21 20:33:13,680 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3581 transitions. Word has length 21 [2021-05-21 20:33:13,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:13,681 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3581 transitions. [2021-05-21 20:33:13,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:13,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3581 transitions. [2021-05-21 20:33:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:13,683 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:13,683 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] [2021-05-21 20:33:13,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:13,905 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-05-21 20:33:13,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:13,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907406161] [2021-05-21 20:33:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907406161] [2021-05-21 20:33:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907406161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288210725] [2021-05-21 20:33:13,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:13,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288210725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:14,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049501036] [2021-05-21 20:33:14,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:14,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:14,069 INFO L87 Difference]: Start difference. First operand 1045 states and 3581 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:14,445 INFO L93 Difference]: Finished difference Result 2671 states and 8447 transitions. [2021-05-21 20:33:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:14,457 INFO L225 Difference]: With dead ends: 2671 [2021-05-21 20:33:14,458 INFO L226 Difference]: Without dead ends: 2671 [2021-05-21 20:33:14,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-05-21 20:33:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1037. [2021-05-21 20:33:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 3.422779922779923) internal successors, (3546), 1036 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3546 transitions. [2021-05-21 20:33:14,495 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3546 transitions. Word has length 21 [2021-05-21 20:33:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:14,495 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3546 transitions. [2021-05-21 20:33:14,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3546 transitions. [2021-05-21 20:33:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:14,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:14,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:14,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:14,713 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 6 times [2021-05-21 20:33:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166380541] [2021-05-21 20:33:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:14,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:14,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166380541] [2021-05-21 20:33:14,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166380541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146963790] [2021-05-21 20:33:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:14,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:14,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:14,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146963790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:14,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:14,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:14,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694106733] [2021-05-21 20:33:14,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:14,895 INFO L87 Difference]: Start difference. First operand 1037 states and 3546 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:15,452 INFO L93 Difference]: Finished difference Result 1993 states and 6035 transitions. [2021-05-21 20:33:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:33:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:15,458 INFO L225 Difference]: With dead ends: 1993 [2021-05-21 20:33:15,458 INFO L226 Difference]: Without dead ends: 1972 [2021-05-21 20:33:15,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-05-21 20:33:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1033. [2021-05-21 20:33:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.4186046511627906) internal successors, (3528), 1032 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3528 transitions. [2021-05-21 20:33:15,490 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3528 transitions. Word has length 21 [2021-05-21 20:33:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:15,490 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3528 transitions. [2021-05-21 20:33:15,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3528 transitions. [2021-05-21 20:33:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:15,492 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:15,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:15,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 20:33:15,707 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash -178637854, now seen corresponding path program 7 times [2021-05-21 20:33:15,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:15,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540170405] [2021-05-21 20:33:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540170405] [2021-05-21 20:33:15,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540170405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743738875] [2021-05-21 20:33:15,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:15,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743738875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:15,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:15,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315745012] [2021-05-21 20:33:15,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:15,894 INFO L87 Difference]: Start difference. First operand 1033 states and 3528 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:16,285 INFO L93 Difference]: Finished difference Result 1381 states and 4426 transitions. [2021-05-21 20:33:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:16,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:16,289 INFO L225 Difference]: With dead ends: 1381 [2021-05-21 20:33:16,289 INFO L226 Difference]: Without dead ends: 1356 [2021-05-21 20:33:16,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-05-21 20:33:16,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-05-21 20:33:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1063. [2021-05-21 20:33:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.4237288135593222) internal successors, (3636), 1062 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3636 transitions. [2021-05-21 20:33:16,314 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3636 transitions. Word has length 21 [2021-05-21 20:33:16,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:16,314 INFO L482 AbstractCegarLoop]: Abstraction has 1063 states and 3636 transitions. [2021-05-21 20:33:16,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3636 transitions. [2021-05-21 20:33:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:16,317 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:16,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:16,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:16,539 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1461928802, now seen corresponding path program 8 times [2021-05-21 20:33:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:16,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747078551] [2021-05-21 20:33:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:16,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:16,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747078551] [2021-05-21 20:33:16,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747078551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992356351] [2021-05-21 20:33:16,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 20:33:16,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:16,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:16,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:16,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992356351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:16,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:16,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752035335] [2021-05-21 20:33:16,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:16,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:16,720 INFO L87 Difference]: Start difference. First operand 1063 states and 3636 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:17,290 INFO L93 Difference]: Finished difference Result 1755 states and 5386 transitions. [2021-05-21 20:33:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:33:17,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:17,294 INFO L225 Difference]: With dead ends: 1755 [2021-05-21 20:33:17,294 INFO L226 Difference]: Without dead ends: 1734 [2021-05-21 20:33:17,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-21 20:33:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1142. [2021-05-21 20:33:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.422436459246275) internal successors, (3905), 1141 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3905 transitions. [2021-05-21 20:33:17,325 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3905 transitions. Word has length 21 [2021-05-21 20:33:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:17,325 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3905 transitions. [2021-05-21 20:33:17,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3905 transitions. [2021-05-21 20:33:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:17,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:17,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:17,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 20:33:17,550 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -357334110, now seen corresponding path program 9 times [2021-05-21 20:33:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32472849] [2021-05-21 20:33:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:17,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:17,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32472849] [2021-05-21 20:33:17,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32472849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555556162] [2021-05-21 20:33:17,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:17,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:33:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:17,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:17,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555556162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:17,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:17,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:17,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895321658] [2021-05-21 20:33:17,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:17,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:17,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:17,747 INFO L87 Difference]: Start difference. First operand 1142 states and 3905 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:18,496 INFO L93 Difference]: Finished difference Result 1827 states and 5611 transitions. [2021-05-21 20:33:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:33:18,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:18,501 INFO L225 Difference]: With dead ends: 1827 [2021-05-21 20:33:18,501 INFO L226 Difference]: Without dead ends: 1827 [2021-05-21 20:33:18,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:33:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-05-21 20:33:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1142. [2021-05-21 20:33:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.4171779141104293) internal successors, (3899), 1141 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3899 transitions. [2021-05-21 20:33:18,532 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3899 transitions. Word has length 21 [2021-05-21 20:33:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:18,532 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 3899 transitions. [2021-05-21 20:33:18,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:18,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3899 transitions. [2021-05-21 20:33:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:18,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:18,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:18,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:18,749 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2049441946, now seen corresponding path program 10 times [2021-05-21 20:33:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343743640] [2021-05-21 20:33:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:18,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:18,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343743640] [2021-05-21 20:33:18,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343743640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323953704] [2021-05-21 20:33:18,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:18,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:18,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:18,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323953704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:18,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:18,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-21 20:33:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178380333] [2021-05-21 20:33:18,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:18,884 INFO L87 Difference]: Start difference. First operand 1142 states and 3899 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:19,084 INFO L93 Difference]: Finished difference Result 1785 states and 5662 transitions. [2021-05-21 20:33:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:19,088 INFO L225 Difference]: With dead ends: 1785 [2021-05-21 20:33:19,088 INFO L226 Difference]: Without dead ends: 1777 [2021-05-21 20:33:19,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-05-21 20:33:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1158. [2021-05-21 20:33:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3958513396715646) internal successors, (3929), 1157 states have internal predecessors, (3929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3929 transitions. [2021-05-21 20:33:19,116 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3929 transitions. Word has length 21 [2021-05-21 20:33:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:19,116 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3929 transitions. [2021-05-21 20:33:19,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3929 transitions. [2021-05-21 20:33:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:19,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:19,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:19,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 20:33:19,333 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 11 times [2021-05-21 20:33:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:19,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172307373] [2021-05-21 20:33:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:19,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172307373] [2021-05-21 20:33:19,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172307373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:19,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139844946] [2021-05-21 20:33:19,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:19,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:19,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139844946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:19,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:19,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:19,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790246284] [2021-05-21 20:33:19,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:19,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:19,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:19,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:19,510 INFO L87 Difference]: Start difference. First operand 1158 states and 3929 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:20,322 INFO L93 Difference]: Finished difference Result 2577 states and 7865 transitions. [2021-05-21 20:33:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 20:33:20,323 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:20,328 INFO L225 Difference]: With dead ends: 2577 [2021-05-21 20:33:20,328 INFO L226 Difference]: Without dead ends: 2577 [2021-05-21 20:33:20,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 600.8ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:33:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-05-21 20:33:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1259. [2021-05-21 20:33:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4324324324324325) internal successors, (4318), 1258 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:20,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4318 transitions. [2021-05-21 20:33:20,364 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4318 transitions. Word has length 21 [2021-05-21 20:33:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:20,364 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4318 transitions. [2021-05-21 20:33:20,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4318 transitions. [2021-05-21 20:33:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:20,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:20,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:20,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 20:33:20,581 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 12 times [2021-05-21 20:33:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:20,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23235142] [2021-05-21 20:33:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:20,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23235142] [2021-05-21 20:33:20,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23235142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005696073] [2021-05-21 20:33:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:20,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:20,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:20,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:20,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005696073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:20,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:20,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879625223] [2021-05-21 20:33:20,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:20,777 INFO L87 Difference]: Start difference. First operand 1259 states and 4318 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:21,260 INFO L93 Difference]: Finished difference Result 2270 states and 6943 transitions. [2021-05-21 20:33:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:33:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:21,265 INFO L225 Difference]: With dead ends: 2270 [2021-05-21 20:33:21,265 INFO L226 Difference]: Without dead ends: 2249 [2021-05-21 20:33:21,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-05-21 20:33:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1255. [2021-05-21 20:33:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.4210526315789473) internal successors, (4290), 1254 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4290 transitions. [2021-05-21 20:33:21,320 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4290 transitions. Word has length 21 [2021-05-21 20:33:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:21,320 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4290 transitions. [2021-05-21 20:33:21,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:21,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4290 transitions. [2021-05-21 20:33:21,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:21,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:21,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:21,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 20:33:21,546 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:21,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:21,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 13 times [2021-05-21 20:33:21,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:21,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315874595] [2021-05-21 20:33:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:21,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315874595] [2021-05-21 20:33:21,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315874595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258682453] [2021-05-21 20:33:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:21,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:21,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258682453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:21,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:21,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:21,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070130267] [2021-05-21 20:33:21,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:21,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:21,702 INFO L87 Difference]: Start difference. First operand 1255 states and 4290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:22,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:22,565 INFO L93 Difference]: Finished difference Result 2820 states and 8574 transitions. [2021-05-21 20:33:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:33:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:22,569 INFO L225 Difference]: With dead ends: 2820 [2021-05-21 20:33:22,569 INFO L226 Difference]: Without dead ends: 2820 [2021-05-21 20:33:22,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:33:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-05-21 20:33:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1244. [2021-05-21 20:33:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.423974255832663) internal successors, (4256), 1243 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4256 transitions. [2021-05-21 20:33:22,600 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4256 transitions. Word has length 21 [2021-05-21 20:33:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:22,600 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4256 transitions. [2021-05-21 20:33:22,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4256 transitions. [2021-05-21 20:33:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:22,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:22,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:22,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 20:33:22,826 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 14 times [2021-05-21 20:33:22,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:22,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063578644] [2021-05-21 20:33:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:22,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:22,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063578644] [2021-05-21 20:33:22,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063578644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:22,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101911882] [2021-05-21 20:33:22,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:22,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:22,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:23,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101911882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:23,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:23,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:23,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904732533] [2021-05-21 20:33:23,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:23,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:23,017 INFO L87 Difference]: Start difference. First operand 1244 states and 4256 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:23,746 INFO L93 Difference]: Finished difference Result 2539 states and 7790 transitions. [2021-05-21 20:33:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 20:33:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:23,751 INFO L225 Difference]: With dead ends: 2539 [2021-05-21 20:33:23,751 INFO L226 Difference]: Without dead ends: 2539 [2021-05-21 20:33:23,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:33:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-05-21 20:33:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1261. [2021-05-21 20:33:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.4063492063492062) internal successors, (4292), 1260 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4292 transitions. [2021-05-21 20:33:23,798 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4292 transitions. Word has length 21 [2021-05-21 20:33:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:23,798 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4292 transitions. [2021-05-21 20:33:23,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4292 transitions. [2021-05-21 20:33:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:23,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:23,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:24,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 20:33:24,017 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 15 times [2021-05-21 20:33:24,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:24,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182866533] [2021-05-21 20:33:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:24,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182866533] [2021-05-21 20:33:24,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182866533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368195508] [2021-05-21 20:33:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:24,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:24,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:24,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368195508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:24,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398424092] [2021-05-21 20:33:24,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:24,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:24,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:24,214 INFO L87 Difference]: Start difference. First operand 1261 states and 4292 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:24,697 INFO L93 Difference]: Finished difference Result 2197 states and 6773 transitions. [2021-05-21 20:33:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:33:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:24,701 INFO L225 Difference]: With dead ends: 2197 [2021-05-21 20:33:24,701 INFO L226 Difference]: Without dead ends: 2176 [2021-05-21 20:33:24,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-05-21 20:33:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1281. [2021-05-21 20:33:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.41640625) internal successors, (4373), 1280 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4373 transitions. [2021-05-21 20:33:24,731 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4373 transitions. Word has length 21 [2021-05-21 20:33:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:24,731 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4373 transitions. [2021-05-21 20:33:24,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4373 transitions. [2021-05-21 20:33:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:24,734 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:24,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:24,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:24,957 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 16 times [2021-05-21 20:33:24,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:24,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320634174] [2021-05-21 20:33:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:24,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:24,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320634174] [2021-05-21 20:33:24,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320634174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:24,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224442357] [2021-05-21 20:33:24,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:25,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:25,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:25,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:25,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:25,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224442357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:25,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:25,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:25,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696306737] [2021-05-21 20:33:25,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:25,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:25,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:25,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:25,136 INFO L87 Difference]: Start difference. First operand 1281 states and 4373 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:25,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:25,776 INFO L93 Difference]: Finished difference Result 2278 states and 7025 transitions. [2021-05-21 20:33:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:33:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:25,780 INFO L225 Difference]: With dead ends: 2278 [2021-05-21 20:33:25,780 INFO L226 Difference]: Without dead ends: 2278 [2021-05-21 20:33:25,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:33:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-05-21 20:33:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1234. [2021-05-21 20:33:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.4184914841849148) internal successors, (4215), 1233 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 4215 transitions. [2021-05-21 20:33:25,805 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 4215 transitions. Word has length 21 [2021-05-21 20:33:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:25,805 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 4215 transitions. [2021-05-21 20:33:25,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 4215 transitions. [2021-05-21 20:33:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:25,808 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:25,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:26,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 20:33:26,013 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash 310598484, now seen corresponding path program 17 times [2021-05-21 20:33:26,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:26,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556944851] [2021-05-21 20:33:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:26,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556944851] [2021-05-21 20:33:26,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556944851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340935153] [2021-05-21 20:33:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:26,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:26,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:26,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340935153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:26,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58742311] [2021-05-21 20:33:26,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:26,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:26,140 INFO L87 Difference]: Start difference. First operand 1234 states and 4215 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:33:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:26,278 INFO L93 Difference]: Finished difference Result 2607 states and 8438 transitions. [2021-05-21 20:33:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:26,282 INFO L225 Difference]: With dead ends: 2607 [2021-05-21 20:33:26,282 INFO L226 Difference]: Without dead ends: 2607 [2021-05-21 20:33:26,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-05-21 20:33:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1625. [2021-05-21 20:33:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5086206896551726) internal successors, (5698), 1624 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5698 transitions. [2021-05-21 20:33:26,312 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5698 transitions. Word has length 21 [2021-05-21 20:33:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:26,312 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5698 transitions. [2021-05-21 20:33:26,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-21 20:33:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5698 transitions. [2021-05-21 20:33:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:26,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:26,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:26,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:26,521 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:26,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:26,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1830655388, now seen corresponding path program 18 times [2021-05-21 20:33:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:26,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418193947] [2021-05-21 20:33:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418193947] [2021-05-21 20:33:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418193947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379862933] [2021-05-21 20:33:26,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:26,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:26,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:26,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:26,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:26,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379862933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:26,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:26,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-21 20:33:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791598176] [2021-05-21 20:33:26,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:33:26,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:33:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:33:26,657 INFO L87 Difference]: Start difference. First operand 1625 states and 5698 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:26,808 INFO L93 Difference]: Finished difference Result 2392 states and 7815 transitions. [2021-05-21 20:33:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:33:26,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:26,813 INFO L225 Difference]: With dead ends: 2392 [2021-05-21 20:33:26,813 INFO L226 Difference]: Without dead ends: 2384 [2021-05-21 20:33:26,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-05-21 20:33:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1625. [2021-05-21 20:33:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.5043103448275863) internal successors, (5691), 1624 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:26,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5691 transitions. [2021-05-21 20:33:26,857 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5691 transitions. Word has length 21 [2021-05-21 20:33:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:26,857 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5691 transitions. [2021-05-21 20:33:26,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5691 transitions. [2021-05-21 20:33:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:26,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:26,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:27,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 20:33:27,077 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash -981176970, now seen corresponding path program 19 times [2021-05-21 20:33:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:27,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308142358] [2021-05-21 20:33:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308142358] [2021-05-21 20:33:27,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308142358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617345518] [2021-05-21 20:33:27,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617345518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:27,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-05-21 20:33:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900172438] [2021-05-21 20:33:27,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:27,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:27,192 INFO L87 Difference]: Start difference. First operand 1625 states and 5691 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:27,340 INFO L93 Difference]: Finished difference Result 2370 states and 7737 transitions. [2021-05-21 20:33:27,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:27,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-05-21 20:33:27,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:27,344 INFO L225 Difference]: With dead ends: 2370 [2021-05-21 20:33:27,344 INFO L226 Difference]: Without dead ends: 2348 [2021-05-21 20:33:27,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-05-21 20:33:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1669. [2021-05-21 20:33:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4820143884892087) internal successors, (5808), 1668 states have internal predecessors, (5808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5808 transitions. [2021-05-21 20:33:27,379 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5808 transitions. Word has length 21 [2021-05-21 20:33:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:27,379 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5808 transitions. [2021-05-21 20:33:27,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5808 transitions. [2021-05-21 20:33:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:27,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:27,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:27,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 20:33:27,604 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:27,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 1 times [2021-05-21 20:33:27,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:27,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499918539] [2021-05-21 20:33:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499918539] [2021-05-21 20:33:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499918539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362977349] [2021-05-21 20:33:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:27,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362977349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:27,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:27,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133550247] [2021-05-21 20:33:27,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:27,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:27,762 INFO L87 Difference]: Start difference. First operand 1669 states and 5808 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:28,161 INFO L93 Difference]: Finished difference Result 1877 states and 6328 transitions. [2021-05-21 20:33:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:28,164 INFO L225 Difference]: With dead ends: 1877 [2021-05-21 20:33:28,164 INFO L226 Difference]: Without dead ends: 1877 [2021-05-21 20:33:28,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-05-21 20:33:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1705. [2021-05-21 20:33:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.473004694835681) internal successors, (5918), 1704 states have internal predecessors, (5918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5918 transitions. [2021-05-21 20:33:28,208 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5918 transitions. Word has length 21 [2021-05-21 20:33:28,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:28,208 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5918 transitions. [2021-05-21 20:33:28,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5918 transitions. [2021-05-21 20:33:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:28,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:28,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:28,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 20:33:28,423 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:28,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 2 times [2021-05-21 20:33:28,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:28,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198961758] [2021-05-21 20:33:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:28,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:28,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198961758] [2021-05-21 20:33:28,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198961758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:28,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041884050] [2021-05-21 20:33:28,455 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:28,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:28,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:28,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041884050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:28,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:28,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:33:28,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952677997] [2021-05-21 20:33:28,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 20:33:28,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 20:33:28,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:33:28,525 INFO L87 Difference]: Start difference. First operand 1705 states and 5918 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:28,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:28,628 INFO L93 Difference]: Finished difference Result 2649 states and 8845 transitions. [2021-05-21 20:33:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 20:33:28,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21 [2021-05-21 20:33:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:28,636 INFO L225 Difference]: With dead ends: 2649 [2021-05-21 20:33:28,636 INFO L226 Difference]: Without dead ends: 2637 [2021-05-21 20:33:28,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:28,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-05-21 20:33:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 1869. [2021-05-21 20:33:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 3.506423982869379) internal successors, (6550), 1868 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 6550 transitions. [2021-05-21 20:33:28,673 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 6550 transitions. Word has length 21 [2021-05-21 20:33:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:28,673 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 6550 transitions. [2021-05-21 20:33:28,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 6550 transitions. [2021-05-21 20:33:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:28,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:28,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:28,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 20:33:28,893 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:28,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 3 times [2021-05-21 20:33:28,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:28,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057336720] [2021-05-21 20:33:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:28,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:28,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057336720] [2021-05-21 20:33:28,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057336720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:28,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237996390] [2021-05-21 20:33:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:28,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:28,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:28,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:29,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237996390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:29,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:29,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290563041] [2021-05-21 20:33:29,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:29,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:29,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:29,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:29,064 INFO L87 Difference]: Start difference. First operand 1869 states and 6550 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:29,478 INFO L93 Difference]: Finished difference Result 2373 states and 7764 transitions. [2021-05-21 20:33:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:33:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:29,482 INFO L225 Difference]: With dead ends: 2373 [2021-05-21 20:33:29,482 INFO L226 Difference]: Without dead ends: 2365 [2021-05-21 20:33:29,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-05-21 20:33:29,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1911. [2021-05-21 20:33:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.498952879581152) internal successors, (6683), 1910 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:29,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6683 transitions. [2021-05-21 20:33:29,518 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6683 transitions. Word has length 21 [2021-05-21 20:33:29,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:29,518 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 6683 transitions. [2021-05-21 20:33:29,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6683 transitions. [2021-05-21 20:33:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:29,522 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:29,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:29,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 20:33:29,737 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 4 times [2021-05-21 20:33:29,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:29,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335973377] [2021-05-21 20:33:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:29,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:29,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335973377] [2021-05-21 20:33:29,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335973377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503401971] [2021-05-21 20:33:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:29,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:29,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503401971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:29,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:29,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-21 20:33:29,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943428909] [2021-05-21 20:33:29,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 20:33:29,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:29,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 20:33:29,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:33:29,864 INFO L87 Difference]: Start difference. First operand 1911 states and 6683 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:30,003 INFO L93 Difference]: Finished difference Result 3232 states and 10628 transitions. [2021-05-21 20:33:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:30,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:30,009 INFO L225 Difference]: With dead ends: 3232 [2021-05-21 20:33:30,009 INFO L226 Difference]: Without dead ends: 3232 [2021-05-21 20:33:30,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-05-21 20:33:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-05-21 20:33:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1914. [2021-05-21 20:33:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 3.4913748039728176) internal successors, (6679), 1913 states have internal predecessors, (6679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 6679 transitions. [2021-05-21 20:33:30,037 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 6679 transitions. Word has length 21 [2021-05-21 20:33:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:30,038 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 6679 transitions. [2021-05-21 20:33:30,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 6679 transitions. [2021-05-21 20:33:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:30,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:30,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:30,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:30,255 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:30,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 5 times [2021-05-21 20:33:30,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:30,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537111699] [2021-05-21 20:33:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:30,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537111699] [2021-05-21 20:33:30,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537111699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106957789] [2021-05-21 20:33:30,283 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:30,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:30,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:30,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106957789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:30,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:30,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:30,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521550116] [2021-05-21 20:33:30,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:30,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:30,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:30,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:30,414 INFO L87 Difference]: Start difference. First operand 1914 states and 6679 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:30,779 INFO L93 Difference]: Finished difference Result 2236 states and 7415 transitions. [2021-05-21 20:33:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:30,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:30,782 INFO L225 Difference]: With dead ends: 2236 [2021-05-21 20:33:30,782 INFO L226 Difference]: Without dead ends: 2222 [2021-05-21 20:33:30,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 265.2ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:33:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-05-21 20:33:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1921. [2021-05-21 20:33:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4854166666666666) internal successors, (6692), 1920 states have internal predecessors, (6692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6692 transitions. [2021-05-21 20:33:30,807 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6692 transitions. Word has length 21 [2021-05-21 20:33:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:30,807 INFO L482 AbstractCegarLoop]: Abstraction has 1921 states and 6692 transitions. [2021-05-21 20:33:30,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:30,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6692 transitions. [2021-05-21 20:33:30,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:30,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:30,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:31,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 20:33:31,010 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 6 times [2021-05-21 20:33:31,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:31,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656828164] [2021-05-21 20:33:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656828164] [2021-05-21 20:33:31,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656828164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055344231] [2021-05-21 20:33:31,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:31,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:31,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:31,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 20:33:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055344231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:31,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:33:31,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581313215] [2021-05-21 20:33:31,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:33:31,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:31,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:33:31,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:33:31,138 INFO L87 Difference]: Start difference. First operand 1921 states and 6692 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:31,310 INFO L93 Difference]: Finished difference Result 3168 states and 10573 transitions. [2021-05-21 20:33:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 20:33:31,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:31,315 INFO L225 Difference]: With dead ends: 3168 [2021-05-21 20:33:31,315 INFO L226 Difference]: Without dead ends: 3168 [2021-05-21 20:33:31,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-05-21 20:33:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2167. [2021-05-21 20:33:31,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 3.5036934441366574) internal successors, (7589), 2166 states have internal predecessors, (7589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 7589 transitions. [2021-05-21 20:33:31,347 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 7589 transitions. Word has length 21 [2021-05-21 20:33:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:31,347 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 7589 transitions. [2021-05-21 20:33:31,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 7589 transitions. [2021-05-21 20:33:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:31,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:31,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:31,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 20:33:31,550 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 7 times [2021-05-21 20:33:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:31,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455440041] [2021-05-21 20:33:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455440041] [2021-05-21 20:33:31,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455440041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879417284] [2021-05-21 20:33:31,582 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:31,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879417284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:31,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:31,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:31,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091130136] [2021-05-21 20:33:31,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:31,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:31,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:31,697 INFO L87 Difference]: Start difference. First operand 2167 states and 7589 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:31,953 INFO L93 Difference]: Finished difference Result 2425 states and 8213 transitions. [2021-05-21 20:33:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:31,956 INFO L225 Difference]: With dead ends: 2425 [2021-05-21 20:33:31,956 INFO L226 Difference]: Without dead ends: 2400 [2021-05-21 20:33:31,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:33:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-05-21 20:33:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2195. [2021-05-21 20:33:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.4963536918869647) internal successors, (7671), 2194 states have internal predecessors, (7671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7671 transitions. [2021-05-21 20:33:31,984 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7671 transitions. Word has length 21 [2021-05-21 20:33:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:31,985 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 7671 transitions. [2021-05-21 20:33:31,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7671 transitions. [2021-05-21 20:33:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:31,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:31,989 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] [2021-05-21 20:33:32,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:32,201 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-05-21 20:33:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844883704] [2021-05-21 20:33:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:32,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844883704] [2021-05-21 20:33:32,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844883704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:32,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97423369] [2021-05-21 20:33:32,257 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 [2021-05-21 20:33:32,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:32,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97423369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:32,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:32,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:32,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901765874] [2021-05-21 20:33:32,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:32,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:32,378 INFO L87 Difference]: Start difference. First operand 2195 states and 7671 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:32,696 INFO L93 Difference]: Finished difference Result 2917 states and 9926 transitions. [2021-05-21 20:33:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:32,701 INFO L225 Difference]: With dead ends: 2917 [2021-05-21 20:33:32,701 INFO L226 Difference]: Without dead ends: 2917 [2021-05-21 20:33:32,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-05-21 20:33:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2153. [2021-05-21 20:33:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.4990706319702602) internal successors, (7530), 2152 states have internal predecessors, (7530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7530 transitions. [2021-05-21 20:33:32,728 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7530 transitions. Word has length 21 [2021-05-21 20:33:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:32,728 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7530 transitions. [2021-05-21 20:33:32,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7530 transitions. [2021-05-21 20:33:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:32,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:32,731 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] [2021-05-21 20:33:32,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 20:33:32,931 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-05-21 20:33:32,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:32,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281556659] [2021-05-21 20:33:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:32,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:32,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281556659] [2021-05-21 20:33:32,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281556659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:32,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813810771] [2021-05-21 20:33:32,978 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 [2021-05-21 20:33:33,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:33,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:33,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:33,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813810771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:33,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4932725] [2021-05-21 20:33:33,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:33,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:33,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:33,089 INFO L87 Difference]: Start difference. First operand 2153 states and 7530 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:33,500 INFO L93 Difference]: Finished difference Result 3352 states and 11295 transitions. [2021-05-21 20:33:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:33,506 INFO L225 Difference]: With dead ends: 3352 [2021-05-21 20:33:33,507 INFO L226 Difference]: Without dead ends: 3352 [2021-05-21 20:33:33,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-05-21 20:33:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2168. [2021-05-21 20:33:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 3.501153668666359) internal successors, (7587), 2167 states have internal predecessors, (7587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 7587 transitions. [2021-05-21 20:33:33,565 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 7587 transitions. Word has length 21 [2021-05-21 20:33:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:33,567 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 7587 transitions. [2021-05-21 20:33:33,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:33,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 7587 transitions. [2021-05-21 20:33:33,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:33,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:33,571 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:33,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:33,771 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:33,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 8 times [2021-05-21 20:33:33,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:33,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419455082] [2021-05-21 20:33:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:33,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419455082] [2021-05-21 20:33:33,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419455082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969701176] [2021-05-21 20:33:33,811 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:33,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:33,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:33,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:33,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:33,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969701176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:33,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:33,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:33,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593002055] [2021-05-21 20:33:33,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:33,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:33,920 INFO L87 Difference]: Start difference. First operand 2168 states and 7587 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:34,141 INFO L93 Difference]: Finished difference Result 2314 states and 7948 transitions. [2021-05-21 20:33:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 20:33:34,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:34,144 INFO L225 Difference]: With dead ends: 2314 [2021-05-21 20:33:34,144 INFO L226 Difference]: Without dead ends: 2310 [2021-05-21 20:33:34,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-21 20:33:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2176. [2021-05-21 20:33:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-05-21 20:33:34,168 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-05-21 20:33:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:34,168 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-05-21 20:33:34,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-05-21 20:33:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:34,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:34,171 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:34,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 20:33:34,372 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:34,372 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 9 times [2021-05-21 20:33:34,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:34,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617153858] [2021-05-21 20:33:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617153858] [2021-05-21 20:33:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617153858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680974061] [2021-05-21 20:33:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 20:33:34,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680974061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:34,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:34,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882827667] [2021-05-21 20:33:34,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:34,525 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:34,782 INFO L93 Difference]: Finished difference Result 2505 states and 8386 transitions. [2021-05-21 20:33:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:34,785 INFO L225 Difference]: With dead ends: 2505 [2021-05-21 20:33:34,785 INFO L226 Difference]: Without dead ends: 2501 [2021-05-21 20:33:34,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:33:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-05-21 20:33:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2176. [2021-05-21 20:33:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.497471264367816) internal successors, (7607), 2175 states have internal predecessors, (7607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7607 transitions. [2021-05-21 20:33:34,814 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7607 transitions. Word has length 21 [2021-05-21 20:33:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:34,814 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7607 transitions. [2021-05-21 20:33:34,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7607 transitions. [2021-05-21 20:33:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:34,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:34,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:35,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 20:33:35,018 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 10 times [2021-05-21 20:33:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:35,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449292661] [2021-05-21 20:33:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:35,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449292661] [2021-05-21 20:33:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449292661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594844321] [2021-05-21 20:33:35,056 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:35,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:35,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594844321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:35,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:35,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403949030] [2021-05-21 20:33:35,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:35,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:35,166 INFO L87 Difference]: Start difference. First operand 2176 states and 7607 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:35,433 INFO L93 Difference]: Finished difference Result 2440 states and 8233 transitions. [2021-05-21 20:33:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 20:33:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:35,437 INFO L225 Difference]: With dead ends: 2440 [2021-05-21 20:33:35,437 INFO L226 Difference]: Without dead ends: 2433 [2021-05-21 20:33:35,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-05-21 20:33:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2160. [2021-05-21 20:33:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 3.5030106530801297) internal successors, (7563), 2159 states have internal predecessors, (7563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 7563 transitions. [2021-05-21 20:33:35,482 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 7563 transitions. Word has length 21 [2021-05-21 20:33:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:35,482 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 7563 transitions. [2021-05-21 20:33:35,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 7563 transitions. [2021-05-21 20:33:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:35,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:35,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:35,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 20:33:35,686 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 11 times [2021-05-21 20:33:35,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:35,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765115587] [2021-05-21 20:33:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:35,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765115587] [2021-05-21 20:33:35,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765115587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949046628] [2021-05-21 20:33:35,742 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:35,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:35,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:35,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949046628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:35,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:35,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:35,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709318186] [2021-05-21 20:33:35,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:35,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:35,892 INFO L87 Difference]: Start difference. First operand 2160 states and 7563 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:36,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:36,139 INFO L93 Difference]: Finished difference Result 2267 states and 7828 transitions. [2021-05-21 20:33:36,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 20:33:36,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:36,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:36,143 INFO L225 Difference]: With dead ends: 2267 [2021-05-21 20:33:36,143 INFO L226 Difference]: Without dead ends: 2263 [2021-05-21 20:33:36,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-21 20:33:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-05-21 20:33:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2142. [2021-05-21 20:33:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.505838393274171) internal successors, (7506), 2141 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7506 transitions. [2021-05-21 20:33:36,170 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7506 transitions. Word has length 21 [2021-05-21 20:33:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:36,170 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7506 transitions. [2021-05-21 20:33:36,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-05-21 20:33:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7506 transitions. [2021-05-21 20:33:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:36,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:36,175 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] [2021-05-21 20:33:36,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 20:33:36,389 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-05-21 20:33:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:36,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818315289] [2021-05-21 20:33:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:36,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:36,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818315289] [2021-05-21 20:33:36,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818315289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:36,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770587756] [2021-05-21 20:33:36,428 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:36,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:33:36,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:36,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770587756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:36,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:36,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:33:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981043636] [2021-05-21 20:33:36,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:33:36,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:33:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:33:36,533 INFO L87 Difference]: Start difference. First operand 2142 states and 7506 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:36,735 INFO L93 Difference]: Finished difference Result 3127 states and 10480 transitions. [2021-05-21 20:33:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:33:36,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:36,739 INFO L225 Difference]: With dead ends: 3127 [2021-05-21 20:33:36,739 INFO L226 Difference]: Without dead ends: 3117 [2021-05-21 20:33:36,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:33:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-05-21 20:33:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2142. [2021-05-21 20:33:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.500233535730967) internal successors, (7494), 2141 states have internal predecessors, (7494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7494 transitions. [2021-05-21 20:33:36,771 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7494 transitions. Word has length 21 [2021-05-21 20:33:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:36,771 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 7494 transitions. [2021-05-21 20:33:36,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:36,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7494 transitions. [2021-05-21 20:33:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:36,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:36,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:36,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:36,975 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:36,976 INFO L82 PathProgramCache]: Analyzing trace with hash -940636012, now seen corresponding path program 12 times [2021-05-21 20:33:36,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:36,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945958864] [2021-05-21 20:33:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945958864] [2021-05-21 20:33:37,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945958864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555396221] [2021-05-21 20:33:37,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:37,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:37,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:37,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555396221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:37,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:37,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95061100] [2021-05-21 20:33:37,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:37,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:37,109 INFO L87 Difference]: Start difference. First operand 2142 states and 7494 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:37,445 INFO L93 Difference]: Finished difference Result 2611 states and 8731 transitions. [2021-05-21 20:33:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:37,448 INFO L225 Difference]: With dead ends: 2611 [2021-05-21 20:33:37,448 INFO L226 Difference]: Without dead ends: 2586 [2021-05-21 20:33:37,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2021-05-21 20:33:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-05-21 20:33:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2140. [2021-05-21 20:33:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.5002337540906967) internal successors, (7487), 2139 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7487 transitions. [2021-05-21 20:33:37,477 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7487 transitions. Word has length 21 [2021-05-21 20:33:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:37,477 INFO L482 AbstractCegarLoop]: Abstraction has 2140 states and 7487 transitions. [2021-05-21 20:33:37,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7487 transitions. [2021-05-21 20:33:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:37,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:37,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:37,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 20:33:37,685 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:37,686 INFO L82 PathProgramCache]: Analyzing trace with hash -121296748, now seen corresponding path program 13 times [2021-05-21 20:33:37,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:37,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777137657] [2021-05-21 20:33:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777137657] [2021-05-21 20:33:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777137657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650061991] [2021-05-21 20:33:37,712 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:37,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650061991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:37,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:37,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:37,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774365014] [2021-05-21 20:33:37,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:37,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:37,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:37,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:37,822 INFO L87 Difference]: Start difference. First operand 2140 states and 7487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:38,147 INFO L93 Difference]: Finished difference Result 2721 states and 9012 transitions. [2021-05-21 20:33:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:33:38,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:38,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:38,150 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 20:33:38,150 INFO L226 Difference]: Without dead ends: 2696 [2021-05-21 20:33:38,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-05-21 20:33:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2163. [2021-05-21 20:33:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.4930619796484734) internal successors, (7552), 2162 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7552 transitions. [2021-05-21 20:33:38,181 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7552 transitions. Word has length 21 [2021-05-21 20:33:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:38,181 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 7552 transitions. [2021-05-21 20:33:38,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7552 transitions. [2021-05-21 20:33:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:38,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:38,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:38,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 20:33:38,385 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 412592784, now seen corresponding path program 14 times [2021-05-21 20:33:38,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179229243] [2021-05-21 20:33:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:38,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:38,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179229243] [2021-05-21 20:33:38,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179229243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:38,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424995380] [2021-05-21 20:33:38,412 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:38,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424995380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:38,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:38,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:38,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256603960] [2021-05-21 20:33:38,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:38,515 INFO L87 Difference]: Start difference. First operand 2163 states and 7552 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:39,014 INFO L93 Difference]: Finished difference Result 3206 states and 10297 transitions. [2021-05-21 20:33:39,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:33:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:39,019 INFO L225 Difference]: With dead ends: 3206 [2021-05-21 20:33:39,019 INFO L226 Difference]: Without dead ends: 3185 [2021-05-21 20:33:39,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 20:33:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3185 states. [2021-05-21 20:33:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 2230. [2021-05-21 20:33:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.496186630776133) internal successors, (7793), 2229 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 7793 transitions. [2021-05-21 20:33:39,049 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 7793 transitions. Word has length 21 [2021-05-21 20:33:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:39,049 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 7793 transitions. [2021-05-21 20:33:39,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 7793 transitions. [2021-05-21 20:33:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:39,053 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:39,053 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:39,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:39,254 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:39,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1517187476, now seen corresponding path program 15 times [2021-05-21 20:33:39,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:39,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135620777] [2021-05-21 20:33:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:39,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135620777] [2021-05-21 20:33:39,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135620777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537783259] [2021-05-21 20:33:39,283 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:39,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:39,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:39,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537783259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:39,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:39,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380628818] [2021-05-21 20:33:39,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:39,387 INFO L87 Difference]: Start difference. First operand 2230 states and 7793 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:40,093 INFO L93 Difference]: Finished difference Result 3541 states and 11308 transitions. [2021-05-21 20:33:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:33:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:40,098 INFO L225 Difference]: With dead ends: 3541 [2021-05-21 20:33:40,098 INFO L226 Difference]: Without dead ends: 3541 [2021-05-21 20:33:40,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:33:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-05-21 20:33:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 2190. [2021-05-21 20:33:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4920054819552306) internal successors, (7644), 2189 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7644 transitions. [2021-05-21 20:33:40,133 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7644 transitions. Word has length 21 [2021-05-21 20:33:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:40,134 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7644 transitions. [2021-05-21 20:33:40,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7644 transitions. [2021-05-21 20:33:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:40,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:40,137 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] [2021-05-21 20:33:40,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-21 20:33:40,337 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-05-21 20:33:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:40,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826143461] [2021-05-21 20:33:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:40,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:40,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826143461] [2021-05-21 20:33:40,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826143461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:40,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037260984] [2021-05-21 20:33:40,384 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:40,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:40,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037260984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:40,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:40,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135909617] [2021-05-21 20:33:40,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:40,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:40,497 INFO L87 Difference]: Start difference. First operand 2190 states and 7644 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:41,085 INFO L93 Difference]: Finished difference Result 3908 states and 12800 transitions. [2021-05-21 20:33:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:33:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:41,090 INFO L225 Difference]: With dead ends: 3908 [2021-05-21 20:33:41,090 INFO L226 Difference]: Without dead ends: 3900 [2021-05-21 20:33:41,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:33:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-05-21 20:33:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2190. [2021-05-21 20:33:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-05-21 20:33:41,136 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-05-21 20:33:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:41,136 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-05-21 20:33:41,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-05-21 20:33:41,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:41,139 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:41,139 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] [2021-05-21 20:33:41,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:41,353 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-05-21 20:33:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:41,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314400978] [2021-05-21 20:33:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:41,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314400978] [2021-05-21 20:33:41,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314400978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250063398] [2021-05-21 20:33:41,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:41,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:41,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250063398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:41,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:41,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:41,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754607045] [2021-05-21 20:33:41,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:41,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:41,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:41,502 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:42,154 INFO L93 Difference]: Finished difference Result 4086 states and 13513 transitions. [2021-05-21 20:33:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:33:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:42,160 INFO L225 Difference]: With dead ends: 4086 [2021-05-21 20:33:42,160 INFO L226 Difference]: Without dead ends: 4086 [2021-05-21 20:33:42,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:33:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-05-21 20:33:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2190. [2021-05-21 20:33:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.4901781635449978) internal successors, (7640), 2189 states have internal predecessors, (7640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7640 transitions. [2021-05-21 20:33:42,208 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7640 transitions. Word has length 21 [2021-05-21 20:33:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:42,208 INFO L482 AbstractCegarLoop]: Abstraction has 2190 states and 7640 transitions. [2021-05-21 20:33:42,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7640 transitions. [2021-05-21 20:33:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:42,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:42,211 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] [2021-05-21 20:33:42,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-21 20:33:42,417 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-05-21 20:33:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:42,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127307788] [2021-05-21 20:33:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127307788] [2021-05-21 20:33:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127307788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311085882] [2021-05-21 20:33:42,455 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:42,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:33:42,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:42,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311085882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:42,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:42,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944277961] [2021-05-21 20:33:42,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:42,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:42,553 INFO L87 Difference]: Start difference. First operand 2190 states and 7640 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:42,904 INFO L93 Difference]: Finished difference Result 3342 states and 11093 transitions. [2021-05-21 20:33:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:33:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:42,909 INFO L225 Difference]: With dead ends: 3342 [2021-05-21 20:33:42,909 INFO L226 Difference]: Without dead ends: 3334 [2021-05-21 20:33:42,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:33:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-05-21 20:33:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2186. [2021-05-21 20:33:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 3.491075514874142) internal successors, (7628), 2185 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 7628 transitions. [2021-05-21 20:33:42,956 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 7628 transitions. Word has length 21 [2021-05-21 20:33:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:42,957 INFO L482 AbstractCegarLoop]: Abstraction has 2186 states and 7628 transitions. [2021-05-21 20:33:42,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 7628 transitions. [2021-05-21 20:33:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:42,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:42,961 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] [2021-05-21 20:33:43,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,177 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-05-21 20:33:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:43,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087392411] [2021-05-21 20:33:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:43,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:43,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087392411] [2021-05-21 20:33:43,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087392411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564408278] [2021-05-21 20:33:43,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:43,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564408278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:43,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:33:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620777875] [2021-05-21 20:33:43,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:33:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:33:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:33:43,335 INFO L87 Difference]: Start difference. First operand 2186 states and 7628 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:43,625 INFO L93 Difference]: Finished difference Result 3190 states and 10635 transitions. [2021-05-21 20:33:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21 [2021-05-21 20:33:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:43,630 INFO L225 Difference]: With dead ends: 3190 [2021-05-21 20:33:43,630 INFO L226 Difference]: Without dead ends: 3178 [2021-05-21 20:33:43,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:33:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-05-21 20:33:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2184. [2021-05-21 20:33:43,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.4924415941365092) internal successors, (7624), 2183 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7624 transitions. [2021-05-21 20:33:43,662 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7624 transitions. Word has length 21 [2021-05-21 20:33:43,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:43,663 INFO L482 AbstractCegarLoop]: Abstraction has 2184 states and 7624 transitions. [2021-05-21 20:33:43,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7624 transitions. [2021-05-21 20:33:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:43,665 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:43,665 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] [2021-05-21 20:33:43,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-21 20:33:43,866 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-05-21 20:33:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:43,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403337719] [2021-05-21 20:33:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:43,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403337719] [2021-05-21 20:33:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403337719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584604384] [2021-05-21 20:33:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:43,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:43,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:43,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:43,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584604384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:44,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:33:44,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888665255] [2021-05-21 20:33:44,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:33:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:33:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:33:44,027 INFO L87 Difference]: Start difference. First operand 2184 states and 7624 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:44,559 INFO L93 Difference]: Finished difference Result 3630 states and 12185 transitions. [2021-05-21 20:33:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:33:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:44,564 INFO L225 Difference]: With dead ends: 3630 [2021-05-21 20:33:44,564 INFO L226 Difference]: Without dead ends: 3630 [2021-05-21 20:33:44,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-05-21 20:33:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 2175. [2021-05-21 20:33:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4894204231830726) internal successors, (7586), 2174 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7586 transitions. [2021-05-21 20:33:44,599 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7586 transitions. Word has length 21 [2021-05-21 20:33:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:44,599 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7586 transitions. [2021-05-21 20:33:44,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7586 transitions. [2021-05-21 20:33:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 20:33:44,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:44,602 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] [2021-05-21 20:33:44,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 20:33:44,803 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:44,803 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-05-21 20:33:44,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:44,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572702086] [2021-05-21 20:33:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572702086] [2021-05-21 20:33:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572702086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919002155] [2021-05-21 20:33:44,838 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:44,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:33:44,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 20:33:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:44,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919002155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:44,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:44,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-21 20:33:44,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457211433] [2021-05-21 20:33:44,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:33:44,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:44,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:33:44,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:33:44,939 INFO L87 Difference]: Start difference. First operand 2175 states and 7586 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:45,408 INFO L93 Difference]: Finished difference Result 3456 states and 11495 transitions. [2021-05-21 20:33:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 20:33:45,408 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 20:33:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:45,412 INFO L225 Difference]: With dead ends: 3456 [2021-05-21 20:33:45,412 INFO L226 Difference]: Without dead ends: 3446 [2021-05-21 20:33:45,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-05-21 20:33:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-05-21 20:33:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2166. [2021-05-21 20:33:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4891454965357966) internal successors, (7554), 2165 states have internal predecessors, (7554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7554 transitions. [2021-05-21 20:33:45,454 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7554 transitions. Word has length 21 [2021-05-21 20:33:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:45,454 INFO L482 AbstractCegarLoop]: Abstraction has 2166 states and 7554 transitions. [2021-05-21 20:33:45,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7554 transitions. [2021-05-21 20:33:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:33:45,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:45,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:45,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 20:33:45,661 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash -791767740, now seen corresponding path program 20 times [2021-05-21 20:33:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:45,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824496217] [2021-05-21 20:33:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:45,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824496217] [2021-05-21 20:33:45,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824496217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419259452] [2021-05-21 20:33:45,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:45,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:45,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:45,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:33:45,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419259452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:45,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:45,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 20:33:45,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807945768] [2021-05-21 20:33:45,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:33:45,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:45,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:33:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:45,867 INFO L87 Difference]: Start difference. First operand 2166 states and 7554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:46,047 INFO L93 Difference]: Finished difference Result 3313 states and 11224 transitions. [2021-05-21 20:33:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:33:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:33:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:46,054 INFO L225 Difference]: With dead ends: 3313 [2021-05-21 20:33:46,054 INFO L226 Difference]: Without dead ends: 3283 [2021-05-21 20:33:46,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-05-21 20:33:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2707. [2021-05-21 20:33:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 3.5291943828529195) internal successors, (9550), 2706 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 9550 transitions. [2021-05-21 20:33:46,101 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 9550 transitions. Word has length 23 [2021-05-21 20:33:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:46,101 INFO L482 AbstractCegarLoop]: Abstraction has 2707 states and 9550 transitions. [2021-05-21 20:33:46,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 9550 transitions. [2021-05-21 20:33:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:33:46,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:46,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:46,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 20:33:46,305 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash -830121990, now seen corresponding path program 21 times [2021-05-21 20:33:46,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:46,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966190781] [2021-05-21 20:33:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:33:46,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:46,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966190781] [2021-05-21 20:33:46,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966190781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051059769] [2021-05-21 20:33:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:46,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:46,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:46,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:33:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:46,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051059769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:46,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:46,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746896149] [2021-05-21 20:33:46,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:46,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:46,497 INFO L87 Difference]: Start difference. First operand 2707 states and 9550 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:46,659 INFO L93 Difference]: Finished difference Result 3950 states and 13551 transitions. [2021-05-21 20:33:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 20:33:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:33:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:46,664 INFO L225 Difference]: With dead ends: 3950 [2021-05-21 20:33:46,665 INFO L226 Difference]: Without dead ends: 3891 [2021-05-21 20:33:46,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-05-21 20:33:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3295. [2021-05-21 20:33:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.552519732847602) internal successors, (11702), 3294 states have internal predecessors, (11702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11702 transitions. [2021-05-21 20:33:46,709 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11702 transitions. Word has length 23 [2021-05-21 20:33:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:46,709 INFO L482 AbstractCegarLoop]: Abstraction has 3295 states and 11702 transitions. [2021-05-21 20:33:46,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11702 transitions. [2021-05-21 20:33:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:33:46,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:46,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:46,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 20:33:46,934 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:46,935 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 13 times [2021-05-21 20:33:46,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:46,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600824545] [2021-05-21 20:33:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:46,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:46,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600824545] [2021-05-21 20:33:46,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600824545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:46,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900104086] [2021-05-21 20:33:46,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:33:47,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900104086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:47,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327956950] [2021-05-21 20:33:47,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:47,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:47,118 INFO L87 Difference]: Start difference. First operand 3295 states and 11702 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:47,291 INFO L93 Difference]: Finished difference Result 3639 states and 12726 transitions. [2021-05-21 20:33:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:33:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:33:47,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:47,296 INFO L225 Difference]: With dead ends: 3639 [2021-05-21 20:33:47,296 INFO L226 Difference]: Without dead ends: 3609 [2021-05-21 20:33:47,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-05-21 20:33:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3359. [2021-05-21 20:33:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3359 states, 3358 states have (on average 3.5547945205479454) internal successors, (11937), 3358 states have internal predecessors, (11937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 11937 transitions. [2021-05-21 20:33:47,336 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 11937 transitions. Word has length 23 [2021-05-21 20:33:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:47,336 INFO L482 AbstractCegarLoop]: Abstraction has 3359 states and 11937 transitions. [2021-05-21 20:33:47,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 11937 transitions. [2021-05-21 20:33:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:33:47,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:47,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:47,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-21 20:33:47,541 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 14 times [2021-05-21 20:33:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:47,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895679453] [2021-05-21 20:33:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:47,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895679453] [2021-05-21 20:33:47,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895679453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769170376] [2021-05-21 20:33:47,603 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:47,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:47,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 20:33:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769170376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:47,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:47,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-21 20:33:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015761301] [2021-05-21 20:33:47,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:33:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:33:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:33:47,735 INFO L87 Difference]: Start difference. First operand 3359 states and 11937 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:47,886 INFO L93 Difference]: Finished difference Result 3651 states and 12785 transitions. [2021-05-21 20:33:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:33:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-21 20:33:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:47,894 INFO L225 Difference]: With dead ends: 3651 [2021-05-21 20:33:47,894 INFO L226 Difference]: Without dead ends: 3621 [2021-05-21 20:33:47,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:33:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-05-21 20:33:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 3379. [2021-05-21 20:33:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3379 states, 3378 states have (on average 3.5509177027827117) internal successors, (11995), 3378 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3379 states to 3379 states and 11995 transitions. [2021-05-21 20:33:47,958 INFO L78 Accepts]: Start accepts. Automaton has 3379 states and 11995 transitions. Word has length 23 [2021-05-21 20:33:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:47,958 INFO L482 AbstractCegarLoop]: Abstraction has 3379 states and 11995 transitions. [2021-05-21 20:33:47,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3379 states and 11995 transitions. [2021-05-21 20:33:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:47,964 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:47,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:48,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:48,169 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:48,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:48,169 INFO L82 PathProgramCache]: Analyzing trace with hash 964052518, now seen corresponding path program 22 times [2021-05-21 20:33:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:48,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645256730] [2021-05-21 20:33:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:48,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:48,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645256730] [2021-05-21 20:33:48,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645256730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:48,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408744831] [2021-05-21 20:33:48,218 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 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 [2021-05-21 20:33:48,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:33:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408744831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:48,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:48,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:33:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330291610] [2021-05-21 20:33:48,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:33:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:33:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:33:48,355 INFO L87 Difference]: Start difference. First operand 3379 states and 11995 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:48,718 INFO L93 Difference]: Finished difference Result 5445 states and 18470 transitions. [2021-05-21 20:33:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:33:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:48,728 INFO L225 Difference]: With dead ends: 5445 [2021-05-21 20:33:48,728 INFO L226 Difference]: Without dead ends: 5445 [2021-05-21 20:33:48,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:33:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-05-21 20:33:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3811. [2021-05-21 20:33:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3810 states have (on average 3.5700787401574803) internal successors, (13602), 3810 states have internal predecessors, (13602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 13602 transitions. [2021-05-21 20:33:48,811 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 13602 transitions. Word has length 25 [2021-05-21 20:33:48,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:48,811 INFO L482 AbstractCegarLoop]: Abstraction has 3811 states and 13602 transitions. [2021-05-21 20:33:48,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 13602 transitions. [2021-05-21 20:33:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:48,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:48,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:49,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,017 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:49,017 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 15 times [2021-05-21 20:33:49,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:49,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067406040] [2021-05-21 20:33:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:49,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067406040] [2021-05-21 20:33:49,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067406040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581154812] [2021-05-21 20:33:49,064 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:33:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:33:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:49,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581154812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:49,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:33:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249617890] [2021-05-21 20:33:49,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:49,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:49,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:49,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:49,223 INFO L87 Difference]: Start difference. First operand 3811 states and 13602 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:49,599 INFO L93 Difference]: Finished difference Result 5828 states and 20213 transitions. [2021-05-21 20:33:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:33:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:49,609 INFO L225 Difference]: With dead ends: 5828 [2021-05-21 20:33:49,609 INFO L226 Difference]: Without dead ends: 5828 [2021-05-21 20:33:49,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:33:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-05-21 20:33:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4033. [2021-05-21 20:33:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4033 states, 4032 states have (on average 3.5652281746031744) internal successors, (14375), 4032 states have internal predecessors, (14375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4033 states to 4033 states and 14375 transitions. [2021-05-21 20:33:49,668 INFO L78 Accepts]: Start accepts. Automaton has 4033 states and 14375 transitions. Word has length 25 [2021-05-21 20:33:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:49,668 INFO L482 AbstractCegarLoop]: Abstraction has 4033 states and 14375 transitions. [2021-05-21 20:33:49,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4033 states and 14375 transitions. [2021-05-21 20:33:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:49,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:49,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:49,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,877 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash -242410846, now seen corresponding path program 23 times [2021-05-21 20:33:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:49,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500820869] [2021-05-21 20:33:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:49,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500820869] [2021-05-21 20:33:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500820869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554446290] [2021-05-21 20:33:49,926 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:49,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:33:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:50,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554446290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:50,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:50,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652497262] [2021-05-21 20:33:50,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:50,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:50,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:50,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:50,108 INFO L87 Difference]: Start difference. First operand 4033 states and 14375 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:50,644 INFO L93 Difference]: Finished difference Result 5115 states and 17619 transitions. [2021-05-21 20:33:50,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 20:33:50,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:50,651 INFO L225 Difference]: With dead ends: 5115 [2021-05-21 20:33:50,652 INFO L226 Difference]: Without dead ends: 5076 [2021-05-21 20:33:50,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:33:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-05-21 20:33:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4139. [2021-05-21 20:33:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 3.5623489608506524) internal successors, (14741), 4138 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 14741 transitions. [2021-05-21 20:33:50,712 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 14741 transitions. Word has length 25 [2021-05-21 20:33:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:50,712 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 14741 transitions. [2021-05-21 20:33:50,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 14741 transitions. [2021-05-21 20:33:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:50,717 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:50,718 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:50,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:50,918 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 24 times [2021-05-21 20:33:50,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:50,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45806718] [2021-05-21 20:33:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:50,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45806718] [2021-05-21 20:33:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45806718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:50,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702883887] [2021-05-21 20:33:50,965 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:51,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:33:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702883887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:51,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:51,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:51,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639300216] [2021-05-21 20:33:51,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:51,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:51,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:51,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:51,169 INFO L87 Difference]: Start difference. First operand 4139 states and 14741 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:52,970 INFO L93 Difference]: Finished difference Result 9010 states and 29031 transitions. [2021-05-21 20:33:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 20:33:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:52,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:52,984 INFO L225 Difference]: With dead ends: 9010 [2021-05-21 20:33:52,984 INFO L226 Difference]: Without dead ends: 9010 [2021-05-21 20:33:52,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1447.4ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 20:33:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2021-05-21 20:33:53,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 4688. [2021-05-21 20:33:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 3.5850224023895882) internal successors, (16803), 4687 states have internal predecessors, (16803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 16803 transitions. [2021-05-21 20:33:53,120 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 16803 transitions. Word has length 25 [2021-05-21 20:33:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:53,121 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 16803 transitions. [2021-05-21 20:33:53,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 16803 transitions. [2021-05-21 20:33:53,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:53,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:53,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:53,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-21 20:33:53,339 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 16 times [2021-05-21 20:33:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:53,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362580904] [2021-05-21 20:33:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:53,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362580904] [2021-05-21 20:33:53,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362580904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404644982] [2021-05-21 20:33:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:53,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:33:53,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:53,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:33:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:53,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404644982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:53,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:53,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:33:53,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319786402] [2021-05-21 20:33:53,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:53,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:53,554 INFO L87 Difference]: Start difference. First operand 4688 states and 16803 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:54,654 INFO L93 Difference]: Finished difference Result 13558 states and 45474 transitions. [2021-05-21 20:33:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 20:33:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:54,678 INFO L225 Difference]: With dead ends: 13558 [2021-05-21 20:33:54,678 INFO L226 Difference]: Without dead ends: 13548 [2021-05-21 20:33:54,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 20:33:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2021-05-21 20:33:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 6453. [2021-05-21 20:33:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6453 states, 6452 states have (on average 3.6734345939243647) internal successors, (23701), 6452 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 23701 transitions. [2021-05-21 20:33:54,852 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 23701 transitions. Word has length 25 [2021-05-21 20:33:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:54,852 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 23701 transitions. [2021-05-21 20:33:54,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 23701 transitions. [2021-05-21 20:33:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:54,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:54,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:55,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:55,077 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 17 times [2021-05-21 20:33:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:55,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753268231] [2021-05-21 20:33:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:55,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:55,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753268231] [2021-05-21 20:33:55,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753268231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805291096] [2021-05-21 20:33:55,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:55,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:33:55,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:33:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:55,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805291096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:55,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:55,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:33:55,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586344154] [2021-05-21 20:33:55,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:33:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:33:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:33:55,273 INFO L87 Difference]: Start difference. First operand 6453 states and 23701 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:56,456 INFO L93 Difference]: Finished difference Result 16076 states and 53507 transitions. [2021-05-21 20:33:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:33:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:56,484 INFO L225 Difference]: With dead ends: 16076 [2021-05-21 20:33:56,484 INFO L226 Difference]: Without dead ends: 16076 [2021-05-21 20:33:56,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 20:33:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-05-21 20:33:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 5550. [2021-05-21 20:33:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5550 states, 5549 states have (on average 3.6352495945215355) internal successors, (20172), 5549 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5550 states to 5550 states and 20172 transitions. [2021-05-21 20:33:56,620 INFO L78 Accepts]: Start accepts. Automaton has 5550 states and 20172 transitions. Word has length 25 [2021-05-21 20:33:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:56,620 INFO L482 AbstractCegarLoop]: Abstraction has 5550 states and 20172 transitions. [2021-05-21 20:33:56,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5550 states and 20172 transitions. [2021-05-21 20:33:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:56,627 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:56,627 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:56,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 20:33:56,828 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 25 times [2021-05-21 20:33:56,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:56,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604358279] [2021-05-21 20:33:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:56,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604358279] [2021-05-21 20:33:56,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604358279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:56,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012718746] [2021-05-21 20:33:56,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:57,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012718746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:57,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:57,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138079435] [2021-05-21 20:33:57,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:57,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:57,039 INFO L87 Difference]: Start difference. First operand 5550 states and 20172 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:58,299 INFO L93 Difference]: Finished difference Result 8927 states and 29584 transitions. [2021-05-21 20:33:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 20:33:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:58,317 INFO L225 Difference]: With dead ends: 8927 [2021-05-21 20:33:58,317 INFO L226 Difference]: Without dead ends: 8899 [2021-05-21 20:33:58,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 20:33:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-05-21 20:33:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 5452. [2021-05-21 20:33:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5452 states, 5451 states have (on average 3.642634379013025) internal successors, (19856), 5451 states have internal predecessors, (19856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 19856 transitions. [2021-05-21 20:33:58,436 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 19856 transitions. Word has length 25 [2021-05-21 20:33:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:33:58,436 INFO L482 AbstractCegarLoop]: Abstraction has 5452 states and 19856 transitions. [2021-05-21 20:33:58,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 19856 transitions. [2021-05-21 20:33:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:33:58,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:33:58,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:33:58,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:33:58,644 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:33:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:33:58,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 26 times [2021-05-21 20:33:58,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:33:58,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615311028] [2021-05-21 20:33:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:33:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:33:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:58,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:33:58,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615311028] [2021-05-21 20:33:58,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615311028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194957275] [2021-05-21 20:33:58,684 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 [2021-05-21 20:33:58,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:33:58,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:33:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:33:58,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:33:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:33:58,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194957275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:33:58,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:33:58,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:33:58,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788816575] [2021-05-21 20:33:58,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:33:58,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:33:58,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:33:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:33:58,849 INFO L87 Difference]: Start difference. First operand 5452 states and 19856 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:33:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:33:59,928 INFO L93 Difference]: Finished difference Result 8770 states and 29298 transitions. [2021-05-21 20:33:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:33:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:33:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:33:59,942 INFO L225 Difference]: With dead ends: 8770 [2021-05-21 20:33:59,943 INFO L226 Difference]: Without dead ends: 8707 [2021-05-21 20:33:59,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 20:33:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2021-05-21 20:34:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 5570. [2021-05-21 20:34:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5569 states have (on average 3.627760818818459) internal successors, (20203), 5569 states have internal predecessors, (20203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:00,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 20203 transitions. [2021-05-21 20:34:00,060 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 20203 transitions. Word has length 25 [2021-05-21 20:34:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:00,060 INFO L482 AbstractCegarLoop]: Abstraction has 5570 states and 20203 transitions. [2021-05-21 20:34:00,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:00,060 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 20203 transitions. [2021-05-21 20:34:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:00,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:00,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:00,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-21 20:34:00,268 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1974256990, now seen corresponding path program 27 times [2021-05-21 20:34:00,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:00,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016504318] [2021-05-21 20:34:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:00,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:00,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016504318] [2021-05-21 20:34:00,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016504318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:00,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277373818] [2021-05-21 20:34:00,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:34:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:00,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:00,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277373818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:00,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:00,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:00,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839349776] [2021-05-21 20:34:00,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:00,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:00,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:00,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:00,481 INFO L87 Difference]: Start difference. First operand 5570 states and 20203 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:01,158 INFO L93 Difference]: Finished difference Result 6773 states and 23756 transitions. [2021-05-21 20:34:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:34:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:01,173 INFO L225 Difference]: With dead ends: 6773 [2021-05-21 20:34:01,173 INFO L226 Difference]: Without dead ends: 6734 [2021-05-21 20:34:01,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=330, Invalid=1310, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:34:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-05-21 20:34:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 5761. [2021-05-21 20:34:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 3.6230902777777776) internal successors, (20869), 5760 states have internal predecessors, (20869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 20869 transitions. [2021-05-21 20:34:01,288 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 20869 transitions. Word has length 25 [2021-05-21 20:34:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:01,288 INFO L482 AbstractCegarLoop]: Abstraction has 5761 states and 20869 transitions. [2021-05-21 20:34:01,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 20869 transitions. [2021-05-21 20:34:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:01,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:01,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:01,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:01,497 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1733723230, now seen corresponding path program 28 times [2021-05-21 20:34:01,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:01,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753098919] [2021-05-21 20:34:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:01,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753098919] [2021-05-21 20:34:01,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753098919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955973931] [2021-05-21 20:34:01,542 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 [2021-05-21 20:34:01,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:01,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:01,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:01,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955973931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:01,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:01,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:01,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580462418] [2021-05-21 20:34:01,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:01,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:01,780 INFO L87 Difference]: Start difference. First operand 5761 states and 20869 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:02,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:02,698 INFO L93 Difference]: Finished difference Result 7641 states and 26156 transitions. [2021-05-21 20:34:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:34:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:02,711 INFO L225 Difference]: With dead ends: 7641 [2021-05-21 20:34:02,711 INFO L226 Difference]: Without dead ends: 7578 [2021-05-21 20:34:02,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 795.1ms TimeCoverageRelationStatistics Valid=524, Invalid=2026, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:34:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7578 states. [2021-05-21 20:34:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7578 to 6105. [2021-05-21 20:34:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 3.6094364351245085) internal successors, (22032), 6104 states have internal predecessors, (22032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 22032 transitions. [2021-05-21 20:34:02,810 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 22032 transitions. Word has length 25 [2021-05-21 20:34:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:02,810 INFO L482 AbstractCegarLoop]: Abstraction has 6105 states and 22032 transitions. [2021-05-21 20:34:02,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 22032 transitions. [2021-05-21 20:34:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:02,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:02,818 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:03,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:03,019 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1368777634, now seen corresponding path program 29 times [2021-05-21 20:34:03,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:03,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790901138] [2021-05-21 20:34:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:03,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790901138] [2021-05-21 20:34:03,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790901138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:03,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249742050] [2021-05-21 20:34:03,061 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 [2021-05-21 20:34:03,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:34:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:03,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249742050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:03,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:03,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:03,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103473251] [2021-05-21 20:34:03,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:03,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:03,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:03,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:03,214 INFO L87 Difference]: Start difference. First operand 6105 states and 22032 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:04,400 INFO L93 Difference]: Finished difference Result 8374 states and 28326 transitions. [2021-05-21 20:34:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 20:34:04,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:04,413 INFO L225 Difference]: With dead ends: 8374 [2021-05-21 20:34:04,413 INFO L226 Difference]: Without dead ends: 8346 [2021-05-21 20:34:04,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=715, Invalid=2591, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 20:34:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-05-21 20:34:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 6450. [2021-05-21 20:34:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.6004031632811286) internal successors, (23219), 6449 states have internal predecessors, (23219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 23219 transitions. [2021-05-21 20:34:04,517 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 23219 transitions. Word has length 25 [2021-05-21 20:34:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:04,517 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 23219 transitions. [2021-05-21 20:34:04,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 23219 transitions. [2021-05-21 20:34:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:04,527 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:04,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:04,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-21 20:34:04,727 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash -264182942, now seen corresponding path program 30 times [2021-05-21 20:34:04,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:04,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430495502] [2021-05-21 20:34:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:04,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430495502] [2021-05-21 20:34:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430495502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002607748] [2021-05-21 20:34:04,767 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 [2021-05-21 20:34:04,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:04,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002607748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:04,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:04,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:04,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40030766] [2021-05-21 20:34:04,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:04,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:04,947 INFO L87 Difference]: Start difference. First operand 6450 states and 23219 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:06,435 INFO L93 Difference]: Finished difference Result 8593 states and 28882 transitions. [2021-05-21 20:34:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 20:34:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:06,448 INFO L225 Difference]: With dead ends: 8593 [2021-05-21 20:34:06,448 INFO L226 Difference]: Without dead ends: 8581 [2021-05-21 20:34:06,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 1220.2ms TimeCoverageRelationStatistics Valid=1172, Invalid=4084, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 20:34:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8581 states. [2021-05-21 20:34:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8581 to 6369. [2021-05-21 20:34:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6369 states, 6368 states have (on average 3.5976758793969847) internal successors, (22910), 6368 states have internal predecessors, (22910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6369 states to 6369 states and 22910 transitions. [2021-05-21 20:34:06,572 INFO L78 Accepts]: Start accepts. Automaton has 6369 states and 22910 transitions. Word has length 25 [2021-05-21 20:34:06,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:06,572 INFO L482 AbstractCegarLoop]: Abstraction has 6369 states and 22910 transitions. [2021-05-21 20:34:06,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:06,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6369 states and 22910 transitions. [2021-05-21 20:34:06,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:06,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:06,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:06,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:06,783 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1956290778, now seen corresponding path program 31 times [2021-05-21 20:34:06,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:06,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945233078] [2021-05-21 20:34:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:06,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945233078] [2021-05-21 20:34:06,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945233078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:06,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431539828] [2021-05-21 20:34:06,829 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 [2021-05-21 20:34:06,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:34:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:06,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431539828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:06,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:06,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-05-21 20:34:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89687183] [2021-05-21 20:34:06,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:34:06,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:34:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:34:06,937 INFO L87 Difference]: Start difference. First operand 6369 states and 22910 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:07,239 INFO L93 Difference]: Finished difference Result 8392 states and 28777 transitions. [2021-05-21 20:34:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:07,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:07,252 INFO L225 Difference]: With dead ends: 8392 [2021-05-21 20:34:07,252 INFO L226 Difference]: Without dead ends: 8384 [2021-05-21 20:34:07,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:34:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8384 states. [2021-05-21 20:34:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8384 to 6042. [2021-05-21 20:34:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6042 states, 6041 states have (on average 3.577056778679027) internal successors, (21609), 6041 states have internal predecessors, (21609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6042 states to 6042 states and 21609 transitions. [2021-05-21 20:34:07,393 INFO L78 Accepts]: Start accepts. Automaton has 6042 states and 21609 transitions. Word has length 25 [2021-05-21 20:34:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:07,393 INFO L482 AbstractCegarLoop]: Abstraction has 6042 states and 21609 transitions. [2021-05-21 20:34:07,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6042 states and 21609 transitions. [2021-05-21 20:34:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:07,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:07,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:07,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:07,603 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 32 times [2021-05-21 20:34:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:07,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386737912] [2021-05-21 20:34:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:07,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386737912] [2021-05-21 20:34:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386737912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953813613] [2021-05-21 20:34:07,642 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 [2021-05-21 20:34:07,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:07,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953813613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:07,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:07,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:07,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852076018] [2021-05-21 20:34:07,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:07,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:07,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:07,789 INFO L87 Difference]: Start difference. First operand 6042 states and 21609 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:09,517 INFO L93 Difference]: Finished difference Result 10663 states and 35444 transitions. [2021-05-21 20:34:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-21 20:34:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:09,533 INFO L225 Difference]: With dead ends: 10663 [2021-05-21 20:34:09,534 INFO L226 Difference]: Without dead ends: 10663 [2021-05-21 20:34:09,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1283.5ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 20:34:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-05-21 20:34:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 6518. [2021-05-21 20:34:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 3.620991253644315) internal successors, (23598), 6517 states have internal predecessors, (23598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 23598 transitions. [2021-05-21 20:34:09,696 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 23598 transitions. Word has length 25 [2021-05-21 20:34:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:09,696 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 23598 transitions. [2021-05-21 20:34:09,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 23598 transitions. [2021-05-21 20:34:09,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:09,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:09,706 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:09,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-21 20:34:09,907 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 33 times [2021-05-21 20:34:09,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:09,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283094926] [2021-05-21 20:34:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:09,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:09,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283094926] [2021-05-21 20:34:09,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283094926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:09,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892833997] [2021-05-21 20:34:09,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:09,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:10,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892833997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:10,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:10,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:10,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939884203] [2021-05-21 20:34:10,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:10,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:10,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:10,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:10,100 INFO L87 Difference]: Start difference. First operand 6518 states and 23598 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:11,184 INFO L93 Difference]: Finished difference Result 9445 states and 31738 transitions. [2021-05-21 20:34:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:34:11,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:11,200 INFO L225 Difference]: With dead ends: 9445 [2021-05-21 20:34:11,200 INFO L226 Difference]: Without dead ends: 9417 [2021-05-21 20:34:11,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 730.1ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 20:34:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2021-05-21 20:34:11,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 6506. [2021-05-21 20:34:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 3.617524980784012) internal successors, (23532), 6505 states have internal predecessors, (23532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 23532 transitions. [2021-05-21 20:34:11,325 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 23532 transitions. Word has length 25 [2021-05-21 20:34:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:11,325 INFO L482 AbstractCegarLoop]: Abstraction has 6506 states and 23532 transitions. [2021-05-21 20:34:11,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 23532 transitions. [2021-05-21 20:34:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:11,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:11,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:11,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:11,535 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 34 times [2021-05-21 20:34:11,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:11,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747875160] [2021-05-21 20:34:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:11,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:11,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747875160] [2021-05-21 20:34:11,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747875160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:11,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702074577] [2021-05-21 20:34:11,571 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 [2021-05-21 20:34:11,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:11,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:11,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702074577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:11,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:11,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:11,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084916627] [2021-05-21 20:34:11,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:11,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:11,727 INFO L87 Difference]: Start difference. First operand 6506 states and 23532 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:13,499 INFO L93 Difference]: Finished difference Result 11207 states and 37438 transitions. [2021-05-21 20:34:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-21 20:34:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:13,515 INFO L225 Difference]: With dead ends: 11207 [2021-05-21 20:34:13,515 INFO L226 Difference]: Without dead ends: 11207 [2021-05-21 20:34:13,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1303.8ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 20:34:13,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-05-21 20:34:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 6511. [2021-05-21 20:34:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6511 states, 6510 states have (on average 3.6225806451612903) internal successors, (23583), 6510 states have internal predecessors, (23583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:13,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 23583 transitions. [2021-05-21 20:34:13,656 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 23583 transitions. Word has length 25 [2021-05-21 20:34:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:13,657 INFO L482 AbstractCegarLoop]: Abstraction has 6511 states and 23583 transitions. [2021-05-21 20:34:13,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 23583 transitions. [2021-05-21 20:34:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:13,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:13,666 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:13,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-21 20:34:13,878 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:13,878 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 35 times [2021-05-21 20:34:13,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:13,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163657549] [2021-05-21 20:34:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:13,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:13,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163657549] [2021-05-21 20:34:13,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163657549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:13,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581585218] [2021-05-21 20:34:13,918 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 [2021-05-21 20:34:13,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:34:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581585218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:14,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:14,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:14,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82822561] [2021-05-21 20:34:14,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:14,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:14,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:14,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:14,081 INFO L87 Difference]: Start difference. First operand 6511 states and 23583 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:15,409 INFO L93 Difference]: Finished difference Result 10680 states and 35655 transitions. [2021-05-21 20:34:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 20:34:15,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:15,425 INFO L225 Difference]: With dead ends: 10680 [2021-05-21 20:34:15,425 INFO L226 Difference]: Without dead ends: 10668 [2021-05-21 20:34:15,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 979.6ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 20:34:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-05-21 20:34:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 6551. [2021-05-21 20:34:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6551 states, 6550 states have (on average 3.612671755725191) internal successors, (23663), 6550 states have internal predecessors, (23663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6551 states to 6551 states and 23663 transitions. [2021-05-21 20:34:15,560 INFO L78 Accepts]: Start accepts. Automaton has 6551 states and 23663 transitions. Word has length 25 [2021-05-21 20:34:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:15,560 INFO L482 AbstractCegarLoop]: Abstraction has 6551 states and 23663 transitions. [2021-05-21 20:34:15,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6551 states and 23663 transitions. [2021-05-21 20:34:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:15,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:15,569 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:15,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 20:34:15,770 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 36 times [2021-05-21 20:34:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:15,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130633175] [2021-05-21 20:34:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:15,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:15,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130633175] [2021-05-21 20:34:15,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130633175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:15,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071284445] [2021-05-21 20:34:15,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:15,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:15,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:15,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071284445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:15,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:15,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:15,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892221368] [2021-05-21 20:34:15,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:15,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:15,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:15,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:15,951 INFO L87 Difference]: Start difference. First operand 6551 states and 23663 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:17,057 INFO L93 Difference]: Finished difference Result 9675 states and 32431 transitions. [2021-05-21 20:34:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:34:17,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:17,073 INFO L225 Difference]: With dead ends: 9675 [2021-05-21 20:34:17,073 INFO L226 Difference]: Without dead ends: 9654 [2021-05-21 20:34:17,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 20:34:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9654 states. [2021-05-21 20:34:17,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9654 to 6620. [2021-05-21 20:34:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 3.6132346275872487) internal successors, (23916), 6619 states have internal predecessors, (23916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:17,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 23916 transitions. [2021-05-21 20:34:17,224 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 23916 transitions. Word has length 25 [2021-05-21 20:34:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:17,224 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 23916 transitions. [2021-05-21 20:34:17,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 23916 transitions. [2021-05-21 20:34:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:17,233 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:17,233 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:17,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 20:34:17,434 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:17,434 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 37 times [2021-05-21 20:34:17,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:17,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379212404] [2021-05-21 20:34:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:17,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:17,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379212404] [2021-05-21 20:34:17,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379212404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:17,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34773829] [2021-05-21 20:34:17,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:17,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34773829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043135711] [2021-05-21 20:34:17,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:17,595 INFO L87 Difference]: Start difference. First operand 6620 states and 23916 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:18,957 INFO L93 Difference]: Finished difference Result 10253 states and 33929 transitions. [2021-05-21 20:34:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 20:34:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:18,973 INFO L225 Difference]: With dead ends: 10253 [2021-05-21 20:34:18,973 INFO L226 Difference]: Without dead ends: 10241 [2021-05-21 20:34:18,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 976.6ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 20:34:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10241 states. [2021-05-21 20:34:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10241 to 6509. [2021-05-21 20:34:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6509 states, 6508 states have (on average 3.610018438844499) internal successors, (23494), 6508 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 23494 transitions. [2021-05-21 20:34:19,154 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 23494 transitions. Word has length 25 [2021-05-21 20:34:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:19,154 INFO L482 AbstractCegarLoop]: Abstraction has 6509 states and 23494 transitions. [2021-05-21 20:34:19,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 23494 transitions. [2021-05-21 20:34:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:19,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:19,163 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:19,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:19,364 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:19,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 38 times [2021-05-21 20:34:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:19,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017925188] [2021-05-21 20:34:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:19,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017925188] [2021-05-21 20:34:19,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017925188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010528693] [2021-05-21 20:34:19,399 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 [2021-05-21 20:34:19,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:19,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:19,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010528693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:19,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:19,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:19,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491781904] [2021-05-21 20:34:19,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:19,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:19,540 INFO L87 Difference]: Start difference. First operand 6509 states and 23494 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:20,396 INFO L93 Difference]: Finished difference Result 10693 states and 36403 transitions. [2021-05-21 20:34:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:34:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:20,414 INFO L225 Difference]: With dead ends: 10693 [2021-05-21 20:34:20,414 INFO L226 Difference]: Without dead ends: 10630 [2021-05-21 20:34:20,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:34:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10630 states. [2021-05-21 20:34:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10630 to 7017. [2021-05-21 20:34:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 7016 states have (on average 3.6458095781071838) internal successors, (25579), 7016 states have internal predecessors, (25579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 25579 transitions. [2021-05-21 20:34:20,558 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 25579 transitions. Word has length 25 [2021-05-21 20:34:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:20,558 INFO L482 AbstractCegarLoop]: Abstraction has 7017 states and 25579 transitions. [2021-05-21 20:34:20,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 25579 transitions. [2021-05-21 20:34:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:20,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:20,569 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:20,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:20,769 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 39 times [2021-05-21 20:34:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:20,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704831509] [2021-05-21 20:34:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:20,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:20,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704831509] [2021-05-21 20:34:20,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704831509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:20,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359055287] [2021-05-21 20:34:20,818 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 [2021-05-21 20:34:20,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359055287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:20,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:20,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:20,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588732846] [2021-05-21 20:34:20,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:20,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:20,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:20,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:20,972 INFO L87 Difference]: Start difference. First operand 7017 states and 25579 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:22,067 INFO L93 Difference]: Finished difference Result 11280 states and 38187 transitions. [2021-05-21 20:34:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:34:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:22,085 INFO L225 Difference]: With dead ends: 11280 [2021-05-21 20:34:22,085 INFO L226 Difference]: Without dead ends: 11245 [2021-05-21 20:34:22,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:34:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11245 states. [2021-05-21 20:34:22,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11245 to 7482. [2021-05-21 20:34:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7482 states, 7481 states have (on average 3.6388183397941454) internal successors, (27222), 7481 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 27222 transitions. [2021-05-21 20:34:22,234 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 27222 transitions. Word has length 25 [2021-05-21 20:34:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:22,234 INFO L482 AbstractCegarLoop]: Abstraction has 7482 states and 27222 transitions. [2021-05-21 20:34:22,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 27222 transitions. [2021-05-21 20:34:22,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:22,244 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:22,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:22,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:22,461 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:22,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 40 times [2021-05-21 20:34:22,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:22,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978073274] [2021-05-21 20:34:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:22,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978073274] [2021-05-21 20:34:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978073274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340049039] [2021-05-21 20:34:22,500 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:22,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:22,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:22,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340049039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:22,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:22,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:22,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85810382] [2021-05-21 20:34:22,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:22,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:22,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:22,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:22,660 INFO L87 Difference]: Start difference. First operand 7482 states and 27222 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:24,039 INFO L93 Difference]: Finished difference Result 11657 states and 39077 transitions. [2021-05-21 20:34:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 20:34:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:24,059 INFO L225 Difference]: With dead ends: 11657 [2021-05-21 20:34:24,059 INFO L226 Difference]: Without dead ends: 11645 [2021-05-21 20:34:24,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1032.2ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 20:34:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2021-05-21 20:34:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 7340. [2021-05-21 20:34:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7340 states, 7339 states have (on average 3.637825316800654) internal successors, (26698), 7339 states have internal predecessors, (26698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7340 states to 7340 states and 26698 transitions. [2021-05-21 20:34:24,206 INFO L78 Accepts]: Start accepts. Automaton has 7340 states and 26698 transitions. Word has length 25 [2021-05-21 20:34:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:24,206 INFO L482 AbstractCegarLoop]: Abstraction has 7340 states and 26698 transitions. [2021-05-21 20:34:24,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7340 states and 26698 transitions. [2021-05-21 20:34:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:24,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:24,216 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:24,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:24,421 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash -553709480, now seen corresponding path program 41 times [2021-05-21 20:34:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:24,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694514624] [2021-05-21 20:34:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:24,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694514624] [2021-05-21 20:34:24,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694514624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:24,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334920083] [2021-05-21 20:34:24,549 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:24,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:34:24,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:34:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:24,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334920083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:24,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:24,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-21 20:34:24,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417534609] [2021-05-21 20:34:24,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:34:24,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:34:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:34:24,654 INFO L87 Difference]: Start difference. First operand 7340 states and 26698 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:25,026 INFO L93 Difference]: Finished difference Result 17556 states and 60790 transitions. [2021-05-21 20:34:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:34:25,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:25,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:25,057 INFO L225 Difference]: With dead ends: 17556 [2021-05-21 20:34:25,058 INFO L226 Difference]: Without dead ends: 17556 [2021-05-21 20:34:25,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:34:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-05-21 20:34:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 10339. [2021-05-21 20:34:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 3.74530857032308) internal successors, (38719), 10338 states have internal predecessors, (38719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 38719 transitions. [2021-05-21 20:34:25,300 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 38719 transitions. Word has length 25 [2021-05-21 20:34:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:25,300 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 38719 transitions. [2021-05-21 20:34:25,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 38719 transitions. [2021-05-21 20:34:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:25,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:25,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:25,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-21 20:34:25,515 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:25,516 INFO L82 PathProgramCache]: Analyzing trace with hash 966347424, now seen corresponding path program 42 times [2021-05-21 20:34:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:25,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225883776] [2021-05-21 20:34:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:25,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225883776] [2021-05-21 20:34:25,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225883776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257961489] [2021-05-21 20:34:25,554 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:25,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:34:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:25,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:34:25,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257961489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:25,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:25,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-21 20:34:25,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112010468] [2021-05-21 20:34:25,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:34:25,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:34:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:34:25,664 INFO L87 Difference]: Start difference. First operand 10339 states and 38719 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:25,948 INFO L93 Difference]: Finished difference Result 14487 states and 51045 transitions. [2021-05-21 20:34:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:25,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:25,974 INFO L225 Difference]: With dead ends: 14487 [2021-05-21 20:34:25,974 INFO L226 Difference]: Without dead ends: 14473 [2021-05-21 20:34:25,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=172, Invalid=334, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:34:25,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14473 states. [2021-05-21 20:34:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14473 to 9632. [2021-05-21 20:34:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9632 states, 9631 states have (on average 3.7334648530786003) internal successors, (35957), 9631 states have internal predecessors, (35957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9632 states to 9632 states and 35957 transitions. [2021-05-21 20:34:26,173 INFO L78 Accepts]: Start accepts. Automaton has 9632 states and 35957 transitions. Word has length 25 [2021-05-21 20:34:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:26,173 INFO L482 AbstractCegarLoop]: Abstraction has 9632 states and 35957 transitions. [2021-05-21 20:34:26,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 9632 states and 35957 transitions. [2021-05-21 20:34:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:26,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:26,188 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:26,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:26,389 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1845484934, now seen corresponding path program 43 times [2021-05-21 20:34:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:26,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712710064] [2021-05-21 20:34:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:26,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712710064] [2021-05-21 20:34:26,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712710064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328195884] [2021-05-21 20:34:26,434 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:34:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:26,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328195884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:26,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:26,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-05-21 20:34:26,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208415757] [2021-05-21 20:34:26,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:34:26,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:34:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:34:26,527 INFO L87 Difference]: Start difference. First operand 9632 states and 35957 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:26,902 INFO L93 Difference]: Finished difference Result 13632 states and 47869 transitions. [2021-05-21 20:34:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 20:34:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:26,926 INFO L225 Difference]: With dead ends: 13632 [2021-05-21 20:34:26,927 INFO L226 Difference]: Without dead ends: 13610 [2021-05-21 20:34:26,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-05-21 20:34:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2021-05-21 20:34:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 8431. [2021-05-21 20:34:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.7080664294187424) internal successors, (31259), 8430 states have internal predecessors, (31259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 31259 transitions. [2021-05-21 20:34:27,100 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 31259 transitions. Word has length 25 [2021-05-21 20:34:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:27,100 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 31259 transitions. [2021-05-21 20:34:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 31259 transitions. [2021-05-21 20:34:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:27,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:27,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:27,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:27,312 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 44 times [2021-05-21 20:34:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:27,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637455935] [2021-05-21 20:34:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:27,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637455935] [2021-05-21 20:34:27,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637455935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:27,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988888699] [2021-05-21 20:34:27,348 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:27,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988888699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:27,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:27,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:27,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557091988] [2021-05-21 20:34:27,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:27,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:27,503 INFO L87 Difference]: Start difference. First operand 8431 states and 31259 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:29,263 INFO L93 Difference]: Finished difference Result 12080 states and 41798 transitions. [2021-05-21 20:34:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 20:34:29,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:29,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:29,283 INFO L225 Difference]: With dead ends: 12080 [2021-05-21 20:34:29,283 INFO L226 Difference]: Without dead ends: 12080 [2021-05-21 20:34:29,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1347.5ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 20:34:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-05-21 20:34:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 8456. [2021-05-21 20:34:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8456 states, 8455 states have (on average 3.710348905972797) internal successors, (31371), 8455 states have internal predecessors, (31371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8456 states to 8456 states and 31371 transitions. [2021-05-21 20:34:29,475 INFO L78 Accepts]: Start accepts. Automaton has 8456 states and 31371 transitions. Word has length 25 [2021-05-21 20:34:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:29,475 INFO L482 AbstractCegarLoop]: Abstraction has 8456 states and 31371 transitions. [2021-05-21 20:34:29,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8456 states and 31371 transitions. [2021-05-21 20:34:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:29,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:29,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:29,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-21 20:34:29,687 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 45 times [2021-05-21 20:34:29,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:29,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715762583] [2021-05-21 20:34:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:29,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715762583] [2021-05-21 20:34:29,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715762583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929761441] [2021-05-21 20:34:29,716 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:29,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:29,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:29,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929761441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:29,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:29,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181638067] [2021-05-21 20:34:29,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:29,859 INFO L87 Difference]: Start difference. First operand 8456 states and 31371 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:31,030 INFO L93 Difference]: Finished difference Result 10961 states and 38403 transitions. [2021-05-21 20:34:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 20:34:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:31,049 INFO L225 Difference]: With dead ends: 10961 [2021-05-21 20:34:31,049 INFO L226 Difference]: Without dead ends: 10947 [2021-05-21 20:34:31,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 20:34:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10947 states. [2021-05-21 20:34:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10947 to 8438. [2021-05-21 20:34:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8437 states have (on average 3.7093753703923196) internal successors, (31296), 8437 states have internal predecessors, (31296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 31296 transitions. [2021-05-21 20:34:31,209 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 31296 transitions. Word has length 25 [2021-05-21 20:34:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:31,209 INFO L482 AbstractCegarLoop]: Abstraction has 8438 states and 31296 transitions. [2021-05-21 20:34:31,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 31296 transitions. [2021-05-21 20:34:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:31,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:31,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:31,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:31,422 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 46 times [2021-05-21 20:34:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12049287] [2021-05-21 20:34:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:31,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:34:31,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:31,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12049287] [2021-05-21 20:34:31,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12049287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512683161] [2021-05-21 20:34:31,455 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:31,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:31,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:31,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512683161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:31,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:31,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433145757] [2021-05-21 20:34:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:31,587 INFO L87 Difference]: Start difference. First operand 8438 states and 31296 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:32,551 INFO L93 Difference]: Finished difference Result 10752 states and 37881 transitions. [2021-05-21 20:34:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 20:34:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:32,572 INFO L225 Difference]: With dead ends: 10752 [2021-05-21 20:34:32,572 INFO L226 Difference]: Without dead ends: 10689 [2021-05-21 20:34:32,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:34:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-05-21 20:34:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 8433. [2021-05-21 20:34:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8433 states, 8432 states have (on average 3.7100332068311195) internal successors, (31283), 8432 states have internal predecessors, (31283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8433 states to 8433 states and 31283 transitions. [2021-05-21 20:34:32,734 INFO L78 Accepts]: Start accepts. Automaton has 8433 states and 31283 transitions. Word has length 25 [2021-05-21 20:34:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:32,734 INFO L482 AbstractCegarLoop]: Abstraction has 8433 states and 31283 transitions. [2021-05-21 20:34:32,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 8433 states and 31283 transitions. [2021-05-21 20:34:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:32,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:32,745 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:32,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 20:34:32,946 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 18 times [2021-05-21 20:34:32,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:32,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071418476] [2021-05-21 20:34:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:32,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071418476] [2021-05-21 20:34:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071418476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168502027] [2021-05-21 20:34:32,990 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:33,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:33,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:33,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168502027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:33,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:33,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:33,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440726999] [2021-05-21 20:34:33,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:33,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:33,132 INFO L87 Difference]: Start difference. First operand 8433 states and 31283 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:34,003 INFO L93 Difference]: Finished difference Result 9191 states and 33180 transitions. [2021-05-21 20:34:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:34:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:34,017 INFO L225 Difference]: With dead ends: 9191 [2021-05-21 20:34:34,017 INFO L226 Difference]: Without dead ends: 9187 [2021-05-21 20:34:34,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 672.4ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:34:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-05-21 20:34:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8523. [2021-05-21 20:34:34,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8523 states, 8522 states have (on average 3.701243839474302) internal successors, (31542), 8522 states have internal predecessors, (31542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 31542 transitions. [2021-05-21 20:34:34,141 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 31542 transitions. Word has length 25 [2021-05-21 20:34:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:34,141 INFO L482 AbstractCegarLoop]: Abstraction has 8523 states and 31542 transitions. [2021-05-21 20:34:34,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 31542 transitions. [2021-05-21 20:34:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:34,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:34,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:34,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:34,354 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 19 times [2021-05-21 20:34:34,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:34,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128112114] [2021-05-21 20:34:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:34,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:34,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128112114] [2021-05-21 20:34:34,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128112114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:34,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241767265] [2021-05-21 20:34:34,393 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:34,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:34,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241767265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:34,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:34,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:34:34,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167561354] [2021-05-21 20:34:34,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:34,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:34,512 INFO L87 Difference]: Start difference. First operand 8523 states and 31542 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:35,157 INFO L93 Difference]: Finished difference Result 19794 states and 70007 transitions. [2021-05-21 20:34:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:34:35,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:35,194 INFO L225 Difference]: With dead ends: 19794 [2021-05-21 20:34:35,194 INFO L226 Difference]: Without dead ends: 19766 [2021-05-21 20:34:35,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 20:34:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2021-05-21 20:34:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 9783. [2021-05-21 20:34:35,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 9782 states have (on average 3.736659169903905) internal successors, (36552), 9782 states have internal predecessors, (36552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 36552 transitions. [2021-05-21 20:34:35,430 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 36552 transitions. Word has length 25 [2021-05-21 20:34:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 9783 states and 36552 transitions. [2021-05-21 20:34:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 36552 transitions. [2021-05-21 20:34:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:35,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:35,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-05-21 20:34:35,645 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 20 times [2021-05-21 20:34:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988358862] [2021-05-21 20:34:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:35,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:35,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988358862] [2021-05-21 20:34:35,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988358862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5532229] [2021-05-21 20:34:35,677 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:35,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:35,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:35,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5532229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:35,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:35,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:34:35,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252191045] [2021-05-21 20:34:35,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:34:35,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:35,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:34:35,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:34:35,814 INFO L87 Difference]: Start difference. First operand 9783 states and 36552 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:36,454 INFO L93 Difference]: Finished difference Result 24314 states and 85958 transitions. [2021-05-21 20:34:36,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 20:34:36,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:36,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:36,504 INFO L225 Difference]: With dead ends: 24314 [2021-05-21 20:34:36,504 INFO L226 Difference]: Without dead ends: 24300 [2021-05-21 20:34:36,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:34:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24300 states. [2021-05-21 20:34:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24300 to 11688. [2021-05-21 20:34:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11688 states, 11687 states have (on average 3.7396252246085395) internal successors, (43705), 11687 states have internal predecessors, (43705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11688 states to 11688 states and 43705 transitions. [2021-05-21 20:34:36,802 INFO L78 Accepts]: Start accepts. Automaton has 11688 states and 43705 transitions. Word has length 25 [2021-05-21 20:34:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:36,802 INFO L482 AbstractCegarLoop]: Abstraction has 11688 states and 43705 transitions. [2021-05-21 20:34:36,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 11688 states and 43705 transitions. [2021-05-21 20:34:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:36,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:36,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:37,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:37,021 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 21 times [2021-05-21 20:34:37,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:37,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522340384] [2021-05-21 20:34:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:37,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522340384] [2021-05-21 20:34:37,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522340384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714674694] [2021-05-21 20:34:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:37,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714674694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:37,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:37,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:37,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494291155] [2021-05-21 20:34:37,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:37,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:37,209 INFO L87 Difference]: Start difference. First operand 11688 states and 43705 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:38,029 INFO L93 Difference]: Finished difference Result 12255 states and 45097 transitions. [2021-05-21 20:34:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:34:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:38,051 INFO L225 Difference]: With dead ends: 12255 [2021-05-21 20:34:38,051 INFO L226 Difference]: Without dead ends: 12241 [2021-05-21 20:34:38,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:34:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2021-05-21 20:34:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 11650. [2021-05-21 20:34:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 3.7421237874495663) internal successors, (43592), 11649 states have internal predecessors, (43592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 43592 transitions. [2021-05-21 20:34:38,237 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 43592 transitions. Word has length 25 [2021-05-21 20:34:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:38,237 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 43592 transitions. [2021-05-21 20:34:38,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 43592 transitions. [2021-05-21 20:34:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:38,254 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:38,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:38,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-21 20:34:38,454 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:38,454 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 22 times [2021-05-21 20:34:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:38,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031487124] [2021-05-21 20:34:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:38,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:38,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031487124] [2021-05-21 20:34:38,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031487124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742048852] [2021-05-21 20:34:38,492 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:38,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:38,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:38,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742048852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:38,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:38,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736794320] [2021-05-21 20:34:38,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:38,639 INFO L87 Difference]: Start difference. First operand 11650 states and 43592 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:39,332 INFO L93 Difference]: Finished difference Result 12450 states and 45603 transitions. [2021-05-21 20:34:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:34:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:39,354 INFO L225 Difference]: With dead ends: 12450 [2021-05-21 20:34:39,354 INFO L226 Difference]: Without dead ends: 12408 [2021-05-21 20:34:39,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 517.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:34:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2021-05-21 20:34:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 11734. [2021-05-21 20:34:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 3.737151623625671) internal successors, (43848), 11733 states have internal predecessors, (43848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 43848 transitions. [2021-05-21 20:34:39,540 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 43848 transitions. Word has length 25 [2021-05-21 20:34:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:39,540 INFO L482 AbstractCegarLoop]: Abstraction has 11734 states and 43848 transitions. [2021-05-21 20:34:39,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 43848 transitions. [2021-05-21 20:34:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:39,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:39,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:39,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:39,756 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:39,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 23 times [2021-05-21 20:34:39,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:39,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148736181] [2021-05-21 20:34:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:39,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148736181] [2021-05-21 20:34:39,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148736181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:39,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425670082] [2021-05-21 20:34:39,797 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:39,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:34:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:39,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:39,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:39,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425670082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:39,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:39,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:34:39,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105183939] [2021-05-21 20:34:39,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:39,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:39,922 INFO L87 Difference]: Start difference. First operand 11734 states and 43848 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:40,498 INFO L93 Difference]: Finished difference Result 15314 states and 55511 transitions. [2021-05-21 20:34:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:34:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:40,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:40,525 INFO L225 Difference]: With dead ends: 15314 [2021-05-21 20:34:40,526 INFO L226 Difference]: Without dead ends: 15307 [2021-05-21 20:34:40,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:34:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15307 states. [2021-05-21 20:34:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15307 to 11671. [2021-05-21 20:34:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 3.739331619537275) internal successors, (43638), 11670 states have internal predecessors, (43638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 43638 transitions. [2021-05-21 20:34:40,733 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 43638 transitions. Word has length 25 [2021-05-21 20:34:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:40,733 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 43638 transitions. [2021-05-21 20:34:40,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 43638 transitions. [2021-05-21 20:34:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:40,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:40,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:40,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:40,949 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 24 times [2021-05-21 20:34:40,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:40,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290582619] [2021-05-21 20:34:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:40,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:40,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290582619] [2021-05-21 20:34:40,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290582619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:40,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615828405] [2021-05-21 20:34:40,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:41,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:34:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:41,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615828405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:41,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:41,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:41,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976029458] [2021-05-21 20:34:41,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:41,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:41,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:41,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:41,144 INFO L87 Difference]: Start difference. First operand 11671 states and 43638 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:41,614 INFO L93 Difference]: Finished difference Result 12355 states and 45427 transitions. [2021-05-21 20:34:41,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:34:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:41,636 INFO L225 Difference]: With dead ends: 12355 [2021-05-21 20:34:41,636 INFO L226 Difference]: Without dead ends: 12316 [2021-05-21 20:34:41,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:34:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12316 states. [2021-05-21 20:34:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12316 to 11732. [2021-05-21 20:34:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.734634728497144) internal successors, (43811), 11731 states have internal predecessors, (43811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 43811 transitions. [2021-05-21 20:34:41,827 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 43811 transitions. Word has length 25 [2021-05-21 20:34:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:41,827 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 43811 transitions. [2021-05-21 20:34:41,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 43811 transitions. [2021-05-21 20:34:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:41,844 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:41,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:42,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:42,045 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 25 times [2021-05-21 20:34:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:42,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014090165] [2021-05-21 20:34:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:42,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014090165] [2021-05-21 20:34:42,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014090165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:42,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688187156] [2021-05-21 20:34:42,089 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:42,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688187156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:42,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:42,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:34:42,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690143142] [2021-05-21 20:34:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:34:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:34:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:34:42,224 INFO L87 Difference]: Start difference. First operand 11732 states and 43811 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:42,631 INFO L93 Difference]: Finished difference Result 14434 states and 52619 transitions. [2021-05-21 20:34:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 20:34:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:42,658 INFO L225 Difference]: With dead ends: 14434 [2021-05-21 20:34:42,658 INFO L226 Difference]: Without dead ends: 14427 [2021-05-21 20:34:42,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-05-21 20:34:42,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-05-21 20:34:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 11763. [2021-05-21 20:34:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 11762 states have (on average 3.735334126849175) internal successors, (43935), 11762 states have internal predecessors, (43935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 43935 transitions. [2021-05-21 20:34:42,903 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 43935 transitions. Word has length 25 [2021-05-21 20:34:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:42,903 INFO L482 AbstractCegarLoop]: Abstraction has 11763 states and 43935 transitions. [2021-05-21 20:34:42,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 43935 transitions. [2021-05-21 20:34:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:42,919 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:42,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:43,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:43,120 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:43,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 26 times [2021-05-21 20:34:43,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:43,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394092145] [2021-05-21 20:34:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:43,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:43,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394092145] [2021-05-21 20:34:43,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394092145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:43,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544178006] [2021-05-21 20:34:43,161 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:43,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:43,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:43,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544178006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:43,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:43,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:34:43,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453527125] [2021-05-21 20:34:43,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:34:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:34:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:34:43,293 INFO L87 Difference]: Start difference. First operand 11763 states and 43935 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:44,395 INFO L93 Difference]: Finished difference Result 18950 states and 66251 transitions. [2021-05-21 20:34:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:34:44,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:44,431 INFO L225 Difference]: With dead ends: 18950 [2021-05-21 20:34:44,431 INFO L226 Difference]: Without dead ends: 18922 [2021-05-21 20:34:44,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 753.7ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:34:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18922 states. [2021-05-21 20:34:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18922 to 11915. [2021-05-21 20:34:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11915 states, 11914 states have (on average 3.732751384925298) internal successors, (44472), 11914 states have internal predecessors, (44472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11915 states to 11915 states and 44472 transitions. [2021-05-21 20:34:44,670 INFO L78 Accepts]: Start accepts. Automaton has 11915 states and 44472 transitions. Word has length 25 [2021-05-21 20:34:44,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:44,671 INFO L482 AbstractCegarLoop]: Abstraction has 11915 states and 44472 transitions. [2021-05-21 20:34:44,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 11915 states and 44472 transitions. [2021-05-21 20:34:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:44,687 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:44,687 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:44,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-21 20:34:44,887 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:44,888 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 27 times [2021-05-21 20:34:44,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:44,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038243132] [2021-05-21 20:34:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:44,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038243132] [2021-05-21 20:34:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038243132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861406740] [2021-05-21 20:34:44,925 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:44,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:44,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:45,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861406740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:45,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:45,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:45,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442541751] [2021-05-21 20:34:45,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:45,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:45,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:45,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:45,065 INFO L87 Difference]: Start difference. First operand 11915 states and 44472 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:46,112 INFO L93 Difference]: Finished difference Result 13312 states and 48066 transitions. [2021-05-21 20:34:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:34:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:46,137 INFO L225 Difference]: With dead ends: 13312 [2021-05-21 20:34:46,137 INFO L226 Difference]: Without dead ends: 13300 [2021-05-21 20:34:46,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:34:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13300 states. [2021-05-21 20:34:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13300 to 11985. [2021-05-21 20:34:46,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11985 states, 11984 states have (on average 3.7298898531375166) internal successors, (44699), 11984 states have internal predecessors, (44699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11985 states to 11985 states and 44699 transitions. [2021-05-21 20:34:46,345 INFO L78 Accepts]: Start accepts. Automaton has 11985 states and 44699 transitions. Word has length 25 [2021-05-21 20:34:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:46,345 INFO L482 AbstractCegarLoop]: Abstraction has 11985 states and 44699 transitions. [2021-05-21 20:34:46,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11985 states and 44699 transitions. [2021-05-21 20:34:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:46,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:46,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:46,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:46,563 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 28 times [2021-05-21 20:34:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24962477] [2021-05-21 20:34:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:46,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24962477] [2021-05-21 20:34:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24962477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602709685] [2021-05-21 20:34:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:46,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:46,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:46,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:46,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602709685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:46,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:46,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:34:46,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571785369] [2021-05-21 20:34:46,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:34:46,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:34:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:34:46,734 INFO L87 Difference]: Start difference. First operand 11985 states and 44699 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:47,597 INFO L93 Difference]: Finished difference Result 12947 states and 47187 transitions. [2021-05-21 20:34:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:34:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:47,623 INFO L225 Difference]: With dead ends: 12947 [2021-05-21 20:34:47,623 INFO L226 Difference]: Without dead ends: 12926 [2021-05-21 20:34:47,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:34:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12926 states. [2021-05-21 20:34:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12926 to 11863. [2021-05-21 20:34:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11863 states, 11862 states have (on average 3.7376496374978925) internal successors, (44336), 11862 states have internal predecessors, (44336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 44336 transitions. [2021-05-21 20:34:47,822 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 44336 transitions. Word has length 25 [2021-05-21 20:34:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:47,822 INFO L482 AbstractCegarLoop]: Abstraction has 11863 states and 44336 transitions. [2021-05-21 20:34:47,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 44336 transitions. [2021-05-21 20:34:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:47,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:47,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:48,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 20:34:48,040 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 29 times [2021-05-21 20:34:48,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:48,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926476199] [2021-05-21 20:34:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926476199] [2021-05-21 20:34:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926476199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762055761] [2021-05-21 20:34:48,084 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:48,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:34:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:48,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:48,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762055761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:48,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:48,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263519109] [2021-05-21 20:34:48,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:48,333 INFO L87 Difference]: Start difference. First operand 11863 states and 44336 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:49,196 INFO L93 Difference]: Finished difference Result 13151 states and 47733 transitions. [2021-05-21 20:34:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:34:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:49,221 INFO L225 Difference]: With dead ends: 13151 [2021-05-21 20:34:49,221 INFO L226 Difference]: Without dead ends: 13088 [2021-05-21 20:34:49,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 20:34:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-05-21 20:34:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 11932. [2021-05-21 20:34:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11932 states, 11931 states have (on average 3.7329645461403067) internal successors, (44538), 11931 states have internal predecessors, (44538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11932 states to 11932 states and 44538 transitions. [2021-05-21 20:34:49,417 INFO L78 Accepts]: Start accepts. Automaton has 11932 states and 44538 transitions. Word has length 25 [2021-05-21 20:34:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:49,417 INFO L482 AbstractCegarLoop]: Abstraction has 11932 states and 44538 transitions. [2021-05-21 20:34:49,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:49,417 INFO L276 IsEmpty]: Start isEmpty. Operand 11932 states and 44538 transitions. [2021-05-21 20:34:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:49,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:49,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:49,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 20:34:49,634 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:49,634 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 30 times [2021-05-21 20:34:49,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:49,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920119229] [2021-05-21 20:34:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:49,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:49,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920119229] [2021-05-21 20:34:49,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920119229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:49,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465541059] [2021-05-21 20:34:49,676 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:49,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:34:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:49,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465541059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:49,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:49,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:34:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795089637] [2021-05-21 20:34:49,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:34:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:34:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:34:49,839 INFO L87 Difference]: Start difference. First operand 11932 states and 44538 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:50,731 INFO L93 Difference]: Finished difference Result 25464 states and 90243 transitions. [2021-05-21 20:34:50,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:34:50,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:50,783 INFO L225 Difference]: With dead ends: 25464 [2021-05-21 20:34:50,783 INFO L226 Difference]: Without dead ends: 25450 [2021-05-21 20:34:50,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:34:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25450 states. [2021-05-21 20:34:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25450 to 13949. [2021-05-21 20:34:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13949 states, 13948 states have (on average 3.767923716661887) internal successors, (52555), 13948 states have internal predecessors, (52555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 52555 transitions. [2021-05-21 20:34:51,159 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 52555 transitions. Word has length 25 [2021-05-21 20:34:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:51,159 INFO L482 AbstractCegarLoop]: Abstraction has 13949 states and 52555 transitions. [2021-05-21 20:34:51,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 52555 transitions. [2021-05-21 20:34:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:51,180 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:51,180 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:51,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 20:34:51,380 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 31 times [2021-05-21 20:34:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430965521] [2021-05-21 20:34:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:51,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430965521] [2021-05-21 20:34:51,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430965521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220161825] [2021-05-21 20:34:51,418 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:51,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220161825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:51,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:51,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092916975] [2021-05-21 20:34:51,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:51,564 INFO L87 Difference]: Start difference. First operand 13949 states and 52555 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:52,595 INFO L93 Difference]: Finished difference Result 16105 states and 58849 transitions. [2021-05-21 20:34:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:34:52,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:52,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:52,625 INFO L225 Difference]: With dead ends: 16105 [2021-05-21 20:34:52,625 INFO L226 Difference]: Without dead ends: 16097 [2021-05-21 20:34:52,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:34:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2021-05-21 20:34:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 14207. [2021-05-21 20:34:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14207 states, 14206 states have (on average 3.766718288047304) internal successors, (53510), 14206 states have internal predecessors, (53510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14207 states to 14207 states and 53510 transitions. [2021-05-21 20:34:52,900 INFO L78 Accepts]: Start accepts. Automaton has 14207 states and 53510 transitions. Word has length 25 [2021-05-21 20:34:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:52,900 INFO L482 AbstractCegarLoop]: Abstraction has 14207 states and 53510 transitions. [2021-05-21 20:34:52,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 14207 states and 53510 transitions. [2021-05-21 20:34:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:52,926 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:52,926 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:53,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 20:34:53,126 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 32 times [2021-05-21 20:34:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:53,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876696478] [2021-05-21 20:34:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:53,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876696478] [2021-05-21 20:34:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876696478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353436445] [2021-05-21 20:34:53,164 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:53,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:34:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:53,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353436445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:53,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:53,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:53,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076184158] [2021-05-21 20:34:53,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:53,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:53,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:53,304 INFO L87 Difference]: Start difference. First operand 14207 states and 53510 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:54,728 INFO L93 Difference]: Finished difference Result 16652 states and 60233 transitions. [2021-05-21 20:34:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 20:34:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:54,763 INFO L225 Difference]: With dead ends: 16652 [2021-05-21 20:34:54,763 INFO L226 Difference]: Without dead ends: 16644 [2021-05-21 20:34:54,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1072.9ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 20:34:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16644 states. [2021-05-21 20:34:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16644 to 14353. [2021-05-21 20:34:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14353 states, 14352 states have (on average 3.7623327759197323) internal successors, (53997), 14352 states have internal predecessors, (53997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14353 states to 14353 states and 53997 transitions. [2021-05-21 20:34:55,034 INFO L78 Accepts]: Start accepts. Automaton has 14353 states and 53997 transitions. Word has length 25 [2021-05-21 20:34:55,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:55,034 INFO L482 AbstractCegarLoop]: Abstraction has 14353 states and 53997 transitions. [2021-05-21 20:34:55,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:55,034 INFO L276 IsEmpty]: Start isEmpty. Operand 14353 states and 53997 transitions. [2021-05-21 20:34:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:55,055 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:55,055 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:55,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:55,255 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:55,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:55,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 33 times [2021-05-21 20:34:55,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:55,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295705761] [2021-05-21 20:34:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:55,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295705761] [2021-05-21 20:34:55,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295705761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129450805] [2021-05-21 20:34:55,297 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:55,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:34:55,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:55,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129450805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:55,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:55,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096935768] [2021-05-21 20:34:55,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:55,438 INFO L87 Difference]: Start difference. First operand 14353 states and 53997 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:56,557 INFO L93 Difference]: Finished difference Result 16318 states and 59373 transitions. [2021-05-21 20:34:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 20:34:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:56,590 INFO L225 Difference]: With dead ends: 16318 [2021-05-21 20:34:56,590 INFO L226 Difference]: Without dead ends: 16297 [2021-05-21 20:34:56,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 20:34:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16297 states. [2021-05-21 20:34:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16297 to 14217. [2021-05-21 20:34:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14217 states, 14216 states have (on average 3.7649831176139563) internal successors, (53523), 14216 states have internal predecessors, (53523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14217 states to 14217 states and 53523 transitions. [2021-05-21 20:34:56,906 INFO L78 Accepts]: Start accepts. Automaton has 14217 states and 53523 transitions. Word has length 25 [2021-05-21 20:34:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:56,906 INFO L482 AbstractCegarLoop]: Abstraction has 14217 states and 53523 transitions. [2021-05-21 20:34:56,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 14217 states and 53523 transitions. [2021-05-21 20:34:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:56,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:56,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:57,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:57,135 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:57,135 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 34 times [2021-05-21 20:34:57,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:57,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113949891] [2021-05-21 20:34:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:57,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113949891] [2021-05-21 20:34:57,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113949891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731866976] [2021-05-21 20:34:57,174 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:57,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:34:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:57,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:34:57,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731866976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:57,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:57,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:34:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141053315] [2021-05-21 20:34:57,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:34:57,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:34:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:34:57,331 INFO L87 Difference]: Start difference. First operand 14217 states and 53523 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:34:58,566 INFO L93 Difference]: Finished difference Result 17791 states and 64217 transitions. [2021-05-21 20:34:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:34:58,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:34:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:34:58,601 INFO L225 Difference]: With dead ends: 17791 [2021-05-21 20:34:58,601 INFO L226 Difference]: Without dead ends: 17783 [2021-05-21 20:34:58,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 810.5ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:34:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17783 states. [2021-05-21 20:34:58,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17783 to 14184. [2021-05-21 20:34:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14184 states, 14183 states have (on average 3.768455192836494) internal successors, (53448), 14183 states have internal predecessors, (53448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14184 states to 14184 states and 53448 transitions. [2021-05-21 20:34:58,878 INFO L78 Accepts]: Start accepts. Automaton has 14184 states and 53448 transitions. Word has length 25 [2021-05-21 20:34:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:34:58,878 INFO L482 AbstractCegarLoop]: Abstraction has 14184 states and 53448 transitions. [2021-05-21 20:34:58,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:34:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 14184 states and 53448 transitions. [2021-05-21 20:34:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:34:58,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:34:58,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:34:59,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-21 20:34:59,105 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:34:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:34:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 35 times [2021-05-21 20:34:59,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:34:59,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734178189] [2021-05-21 20:34:59,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:34:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:34:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:59,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:34:59,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734178189] [2021-05-21 20:34:59,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734178189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:59,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899125309] [2021-05-21 20:34:59,142 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:34:59,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:34:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:34:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:34:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:34:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:34:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899125309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:34:59,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:34:59,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:34:59,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86600494] [2021-05-21 20:34:59,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:34:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:34:59,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:34:59,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:34:59,285 INFO L87 Difference]: Start difference. First operand 14184 states and 53448 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:00,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:00,082 INFO L93 Difference]: Finished difference Result 22000 states and 79243 transitions. [2021-05-21 20:35:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:35:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:35:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:00,127 INFO L225 Difference]: With dead ends: 22000 [2021-05-21 20:35:00,127 INFO L226 Difference]: Without dead ends: 21980 [2021-05-21 20:35:00,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:35:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21980 states. [2021-05-21 20:35:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21980 to 14177. [2021-05-21 20:35:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-05-21 20:35:00,446 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-05-21 20:35:00,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:00,446 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-05-21 20:35:00,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:00,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-05-21 20:35:00,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:00,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:00,467 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:00,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 20:35:00,667 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash 184920788, now seen corresponding path program 36 times [2021-05-21 20:35:00,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:00,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784021402] [2021-05-21 20:35:00,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784021402] [2021-05-21 20:35:00,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784021402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353495252] [2021-05-21 20:35:00,707 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:00,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:35:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:00,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353495252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:00,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:00,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:00,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090622985] [2021-05-21 20:35:00,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:00,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:00,866 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:01,537 INFO L93 Difference]: Finished difference Result 16102 states and 58957 transitions. [2021-05-21 20:35:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:35:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:01,568 INFO L225 Difference]: With dead ends: 16102 [2021-05-21 20:35:01,568 INFO L226 Difference]: Without dead ends: 16063 [2021-05-21 20:35:01,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:35:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2021-05-21 20:35:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 14177. [2021-05-21 20:35:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.766577313769752) internal successors, (53395), 14176 states have internal predecessors, (53395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 53395 transitions. [2021-05-21 20:35:01,840 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 53395 transitions. Word has length 25 [2021-05-21 20:35:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:01,840 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 53395 transitions. [2021-05-21 20:35:01,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 53395 transitions. [2021-05-21 20:35:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:01,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:01,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:02,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-21 20:35:02,062 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1590938324, now seen corresponding path program 37 times [2021-05-21 20:35:02,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:02,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355304192] [2021-05-21 20:35:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:02,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355304192] [2021-05-21 20:35:02,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355304192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512155143] [2021-05-21 20:35:02,102 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:02,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512155143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:02,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:02,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:02,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762050594] [2021-05-21 20:35:02,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:02,250 INFO L87 Difference]: Start difference. First operand 14177 states and 53395 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:02,973 INFO L93 Difference]: Finished difference Result 16364 states and 59643 transitions. [2021-05-21 20:35:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 20:35:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:03,006 INFO L225 Difference]: With dead ends: 16364 [2021-05-21 20:35:03,006 INFO L226 Difference]: Without dead ends: 16325 [2021-05-21 20:35:03,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=414, Invalid=1392, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:35:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-05-21 20:35:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 14230. [2021-05-21 20:35:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14230 states, 14229 states have (on average 3.7625975121231288) internal successors, (53538), 14229 states have internal predecessors, (53538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14230 states to 14230 states and 53538 transitions. [2021-05-21 20:35:03,282 INFO L78 Accepts]: Start accepts. Automaton has 14230 states and 53538 transitions. Word has length 25 [2021-05-21 20:35:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:03,282 INFO L482 AbstractCegarLoop]: Abstraction has 14230 states and 53538 transitions. [2021-05-21 20:35:03,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 14230 states and 53538 transitions. [2021-05-21 20:35:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:03,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:03,307 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:03,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:03,507 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -737296944, now seen corresponding path program 38 times [2021-05-21 20:35:03,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:03,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922576151] [2021-05-21 20:35:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:03,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:03,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922576151] [2021-05-21 20:35:03,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922576151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:03,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710792295] [2021-05-21 20:35:03,548 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:03,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710792295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:03,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440217192] [2021-05-21 20:35:03,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:03,687 INFO L87 Difference]: Start difference. First operand 14230 states and 53538 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:04,541 INFO L93 Difference]: Finished difference Result 17402 states and 62642 transitions. [2021-05-21 20:35:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:35:04,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:04,576 INFO L225 Difference]: With dead ends: 17402 [2021-05-21 20:35:04,576 INFO L226 Difference]: Without dead ends: 17346 [2021-05-21 20:35:04,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 615.4ms TimeCoverageRelationStatistics Valid=588, Invalid=1962, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:35:04,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2021-05-21 20:35:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 14300. [2021-05-21 20:35:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14300 states, 14299 states have (on average 3.7624309392265194) internal successors, (53799), 14299 states have internal predecessors, (53799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14300 states to 14300 states and 53799 transitions. [2021-05-21 20:35:04,908 INFO L78 Accepts]: Start accepts. Automaton has 14300 states and 53799 transitions. Word has length 25 [2021-05-21 20:35:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:04,908 INFO L482 AbstractCegarLoop]: Abstraction has 14300 states and 53799 transitions. [2021-05-21 20:35:04,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14300 states and 53799 transitions. [2021-05-21 20:35:04,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:04,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:04,931 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:05,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:05,134 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:05,135 INFO L82 PathProgramCache]: Analyzing trace with hash 455169488, now seen corresponding path program 39 times [2021-05-21 20:35:05,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:05,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879792439] [2021-05-21 20:35:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:05,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879792439] [2021-05-21 20:35:05,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879792439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463214378] [2021-05-21 20:35:05,170 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:05,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:35:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463214378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:05,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260090462] [2021-05-21 20:35:05,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:05,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:05,310 INFO L87 Difference]: Start difference. First operand 14300 states and 53799 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:06,432 INFO L93 Difference]: Finished difference Result 17837 states and 63858 transitions. [2021-05-21 20:35:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:35:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:06,469 INFO L225 Difference]: With dead ends: 17837 [2021-05-21 20:35:06,469 INFO L226 Difference]: Without dead ends: 17809 [2021-05-21 20:35:06,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 842.0ms TimeCoverageRelationStatistics Valid=831, Invalid=2591, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:35:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17809 states. [2021-05-21 20:35:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17809 to 14629. [2021-05-21 20:35:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14629 states, 14628 states have (on average 3.7605961170358215) internal successors, (55010), 14628 states have internal predecessors, (55010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:06,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14629 states to 14629 states and 55010 transitions. [2021-05-21 20:35:06,775 INFO L78 Accepts]: Start accepts. Automaton has 14629 states and 55010 transitions. Word has length 25 [2021-05-21 20:35:06,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:06,775 INFO L482 AbstractCegarLoop]: Abstraction has 14629 states and 55010 transitions. [2021-05-21 20:35:06,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14629 states and 55010 transitions. [2021-05-21 20:35:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:06,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:06,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:06,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 20:35:06,999 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1559764180, now seen corresponding path program 40 times [2021-05-21 20:35:07,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:07,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559138696] [2021-05-21 20:35:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:07,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:07,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559138696] [2021-05-21 20:35:07,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559138696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:07,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265675969] [2021-05-21 20:35:07,037 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:07,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:07,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:07,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265675969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:07,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:07,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289932408] [2021-05-21 20:35:07,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:07,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:07,186 INFO L87 Difference]: Start difference. First operand 14629 states and 55010 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:08,511 INFO L93 Difference]: Finished difference Result 18031 states and 64399 transitions. [2021-05-21 20:35:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 20:35:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:08,545 INFO L225 Difference]: With dead ends: 18031 [2021-05-21 20:35:08,545 INFO L226 Difference]: Without dead ends: 18031 [2021-05-21 20:35:08,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 992.3ms TimeCoverageRelationStatistics Valid=1162, Invalid=3394, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 20:35:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18031 states. [2021-05-21 20:35:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18031 to 14473. [2021-05-21 20:35:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14472 states have (on average 3.7587064676616917) internal successors, (54396), 14472 states have internal predecessors, (54396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 54396 transitions. [2021-05-21 20:35:08,984 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 54396 transitions. Word has length 25 [2021-05-21 20:35:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:08,984 INFO L482 AbstractCegarLoop]: Abstraction has 14473 states and 54396 transitions. [2021-05-21 20:35:08,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 54396 transitions. [2021-05-21 20:35:09,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:09,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:09,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:09,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 20:35:09,208 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 41 times [2021-05-21 20:35:09,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:09,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967174291] [2021-05-21 20:35:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:09,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967174291] [2021-05-21 20:35:09,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967174291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:09,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661610331] [2021-05-21 20:35:09,243 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:09,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:35:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:09,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661610331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:09,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:09,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:09,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488795162] [2021-05-21 20:35:09,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:09,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:09,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:09,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:09,390 INFO L87 Difference]: Start difference. First operand 14473 states and 54396 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:11,337 INFO L93 Difference]: Finished difference Result 35647 states and 127415 transitions. [2021-05-21 20:35:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-21 20:35:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:11,418 INFO L225 Difference]: With dead ends: 35647 [2021-05-21 20:35:11,419 INFO L226 Difference]: Without dead ends: 35617 [2021-05-21 20:35:11,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1277.8ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 20:35:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35617 states. [2021-05-21 20:35:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35617 to 18774. [2021-05-21 20:35:11,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18774 states, 18773 states have (on average 3.835082299046503) internal successors, (71996), 18773 states have internal predecessors, (71996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18774 states to 18774 states and 71996 transitions. [2021-05-21 20:35:12,102 INFO L78 Accepts]: Start accepts. Automaton has 18774 states and 71996 transitions. Word has length 25 [2021-05-21 20:35:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:12,102 INFO L482 AbstractCegarLoop]: Abstraction has 18774 states and 71996 transitions. [2021-05-21 20:35:12,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18774 states and 71996 transitions. [2021-05-21 20:35:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:12,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:12,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:12,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:12,337 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 42 times [2021-05-21 20:35:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:12,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515740911] [2021-05-21 20:35:12,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:12,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515740911] [2021-05-21 20:35:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515740911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603826588] [2021-05-21 20:35:12,371 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:12,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:35:12,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:12,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603826588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:12,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:12,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:12,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653683199] [2021-05-21 20:35:12,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:12,584 INFO L87 Difference]: Start difference. First operand 18774 states and 71996 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:14,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:14,622 INFO L93 Difference]: Finished difference Result 41975 states and 148341 transitions. [2021-05-21 20:35:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 20:35:14,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:14,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:14,720 INFO L225 Difference]: With dead ends: 41975 [2021-05-21 20:35:14,721 INFO L226 Difference]: Without dead ends: 41947 [2021-05-21 20:35:14,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1394.2ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 20:35:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41947 states. [2021-05-21 20:35:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41947 to 17457. [2021-05-21 20:35:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17457 states, 17456 states have (on average 3.817942254812099) internal successors, (66646), 17456 states have internal predecessors, (66646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17457 states to 17457 states and 66646 transitions. [2021-05-21 20:35:15,384 INFO L78 Accepts]: Start accepts. Automaton has 17457 states and 66646 transitions. Word has length 25 [2021-05-21 20:35:15,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:15,384 INFO L482 AbstractCegarLoop]: Abstraction has 17457 states and 66646 transitions. [2021-05-21 20:35:15,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17457 states and 66646 transitions. [2021-05-21 20:35:15,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:15,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:15,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:15,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-21 20:35:15,615 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:15,615 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 43 times [2021-05-21 20:35:15,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:15,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943610330] [2021-05-21 20:35:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:15,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:15,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943610330] [2021-05-21 20:35:15,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943610330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:15,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262430350] [2021-05-21 20:35:15,748 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:15,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262430350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:15,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:15,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:15,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698957681] [2021-05-21 20:35:15,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:15,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:15,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:15,867 INFO L87 Difference]: Start difference. First operand 17457 states and 66646 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:17,800 INFO L93 Difference]: Finished difference Result 36580 states and 131067 transitions. [2021-05-21 20:35:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 20:35:17,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:17,891 INFO L225 Difference]: With dead ends: 36580 [2021-05-21 20:35:17,891 INFO L226 Difference]: Without dead ends: 36556 [2021-05-21 20:35:17,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2617 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-05-21 20:35:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36556 states. [2021-05-21 20:35:18,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36556 to 18518. [2021-05-21 20:35:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 3.856510233839175) internal successors, (71411), 18517 states have internal predecessors, (71411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 71411 transitions. [2021-05-21 20:35:18,518 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 71411 transitions. Word has length 25 [2021-05-21 20:35:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:18,518 INFO L482 AbstractCegarLoop]: Abstraction has 18518 states and 71411 transitions. [2021-05-21 20:35:18,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 71411 transitions. [2021-05-21 20:35:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:18,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:18,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:18,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:18,747 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 44 times [2021-05-21 20:35:18,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:18,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092658642] [2021-05-21 20:35:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:18,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092658642] [2021-05-21 20:35:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092658642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177728948] [2021-05-21 20:35:18,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:18,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:18,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:18,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177728948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:18,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:18,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:18,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944386797] [2021-05-21 20:35:18,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:18,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:18,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:18,915 INFO L87 Difference]: Start difference. First operand 18518 states and 71411 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:20,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:20,576 INFO L93 Difference]: Finished difference Result 41528 states and 148376 transitions. [2021-05-21 20:35:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 20:35:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:20,767 INFO L225 Difference]: With dead ends: 41528 [2021-05-21 20:35:20,768 INFO L226 Difference]: Without dead ends: 41528 [2021-05-21 20:35:20,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1003.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 20:35:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-05-21 20:35:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 18785. [2021-05-21 20:35:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18785 states, 18784 states have (on average 3.8521081771720613) internal successors, (72358), 18784 states have internal predecessors, (72358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18785 states to 18785 states and 72358 transitions. [2021-05-21 20:35:21,360 INFO L78 Accepts]: Start accepts. Automaton has 18785 states and 72358 transitions. Word has length 25 [2021-05-21 20:35:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:21,360 INFO L482 AbstractCegarLoop]: Abstraction has 18785 states and 72358 transitions. [2021-05-21 20:35:21,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 18785 states and 72358 transitions. [2021-05-21 20:35:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:21,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:21,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:21,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-21 20:35:21,616 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:21,616 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 45 times [2021-05-21 20:35:21,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:21,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461417935] [2021-05-21 20:35:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:21,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461417935] [2021-05-21 20:35:21,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461417935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:21,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897382014] [2021-05-21 20:35:21,646 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:21,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 20:35:21,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:21,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897382014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:21,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:21,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613270690] [2021-05-21 20:35:21,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:21,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:21,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:21,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:21,786 INFO L87 Difference]: Start difference. First operand 18785 states and 72358 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:23,490 INFO L93 Difference]: Finished difference Result 27513 states and 99519 transitions. [2021-05-21 20:35:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 20:35:23,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:23,550 INFO L225 Difference]: With dead ends: 27513 [2021-05-21 20:35:23,550 INFO L226 Difference]: Without dead ends: 27489 [2021-05-21 20:35:23,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1016.9ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 20:35:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27489 states. [2021-05-21 20:35:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27489 to 18811. [2021-05-21 20:35:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18811 states, 18810 states have (on average 3.8517278043593834) internal successors, (72451), 18810 states have internal predecessors, (72451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:24,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18811 states to 18811 states and 72451 transitions. [2021-05-21 20:35:24,080 INFO L78 Accepts]: Start accepts. Automaton has 18811 states and 72451 transitions. Word has length 25 [2021-05-21 20:35:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:24,080 INFO L482 AbstractCegarLoop]: Abstraction has 18811 states and 72451 transitions. [2021-05-21 20:35:24,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:24,080 INFO L276 IsEmpty]: Start isEmpty. Operand 18811 states and 72451 transitions. [2021-05-21 20:35:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:24,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:24,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:24,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:24,307 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 46 times [2021-05-21 20:35:24,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:24,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312914926] [2021-05-21 20:35:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:24,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:24,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312914926] [2021-05-21 20:35:24,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312914926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:24,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60376983] [2021-05-21 20:35:24,337 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:24,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:24,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60376983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:24,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:24,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:24,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997225757] [2021-05-21 20:35:24,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:24,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:24,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:24,452 INFO L87 Difference]: Start difference. First operand 18811 states and 72451 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:24,836 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-05-21 20:35:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:25,645 INFO L93 Difference]: Finished difference Result 26218 states and 95948 transitions. [2021-05-21 20:35:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 20:35:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:25,706 INFO L225 Difference]: With dead ends: 26218 [2021-05-21 20:35:25,706 INFO L226 Difference]: Without dead ends: 26184 [2021-05-21 20:35:25,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 20:35:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-05-21 20:35:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 18809. [2021-05-21 20:35:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18809 states, 18808 states have (on average 3.8517120374308806) internal successors, (72443), 18808 states have internal predecessors, (72443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18809 states to 18809 states and 72443 transitions. [2021-05-21 20:35:26,197 INFO L78 Accepts]: Start accepts. Automaton has 18809 states and 72443 transitions. Word has length 25 [2021-05-21 20:35:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:26,198 INFO L482 AbstractCegarLoop]: Abstraction has 18809 states and 72443 transitions. [2021-05-21 20:35:26,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 18809 states and 72443 transitions. [2021-05-21 20:35:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:26,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:26,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:26,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 20:35:26,428 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 47 times [2021-05-21 20:35:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:26,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736376554] [2021-05-21 20:35:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:26,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736376554] [2021-05-21 20:35:26,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736376554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:26,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730322278] [2021-05-21 20:35:26,474 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:26,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:26,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730322278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:26,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:26,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:26,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196729280] [2021-05-21 20:35:26,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:26,630 INFO L87 Difference]: Start difference. First operand 18809 states and 72443 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:27,375 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-05-21 20:35:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:28,434 INFO L93 Difference]: Finished difference Result 44899 states and 160666 transitions. [2021-05-21 20:35:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 20:35:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:28,544 INFO L225 Difference]: With dead ends: 44899 [2021-05-21 20:35:28,544 INFO L226 Difference]: Without dead ends: 44892 [2021-05-21 20:35:28,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1204.0ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 20:35:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44892 states. [2021-05-21 20:35:29,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44892 to 19185. [2021-05-21 20:35:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19185 states, 19184 states have (on average 3.875260633861551) internal successors, (74343), 19184 states have internal predecessors, (74343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19185 states to 19185 states and 74343 transitions. [2021-05-21 20:35:29,242 INFO L78 Accepts]: Start accepts. Automaton has 19185 states and 74343 transitions. Word has length 25 [2021-05-21 20:35:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:29,242 INFO L482 AbstractCegarLoop]: Abstraction has 19185 states and 74343 transitions. [2021-05-21 20:35:29,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19185 states and 74343 transitions. [2021-05-21 20:35:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:29,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:29,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:29,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:29,471 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 48 times [2021-05-21 20:35:29,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:29,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581637543] [2021-05-21 20:35:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:29,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:29,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581637543] [2021-05-21 20:35:29,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581637543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:29,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251163465] [2021-05-21 20:35:29,501 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:29,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 20:35:29,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:29,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251163465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:29,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:29,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370489905] [2021-05-21 20:35:29,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:29,632 INFO L87 Difference]: Start difference. First operand 19185 states and 74343 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:29,873 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-21 20:35:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:31,214 INFO L93 Difference]: Finished difference Result 37958 states and 137798 transitions. [2021-05-21 20:35:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 20:35:31,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:35:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:31,300 INFO L225 Difference]: With dead ends: 37958 [2021-05-21 20:35:31,300 INFO L226 Difference]: Without dead ends: 37918 [2021-05-21 20:35:31,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1029.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-05-21 20:35:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37918 states. [2021-05-21 20:35:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37918 to 19182. [2021-05-21 20:35:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19182 states, 19181 states have (on average 3.8743548303008186) internal successors, (74314), 19181 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19182 states to 19182 states and 74314 transitions. [2021-05-21 20:35:31,874 INFO L78 Accepts]: Start accepts. Automaton has 19182 states and 74314 transitions. Word has length 25 [2021-05-21 20:35:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:31,874 INFO L482 AbstractCegarLoop]: Abstraction has 19182 states and 74314 transitions. [2021-05-21 20:35:31,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:31,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19182 states and 74314 transitions. [2021-05-21 20:35:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:31,902 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:31,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:32,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:32,113 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 49 times [2021-05-21 20:35:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377129297] [2021-05-21 20:35:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:32,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:32,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377129297] [2021-05-21 20:35:32,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377129297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:32,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972224135] [2021-05-21 20:35:32,142 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972224135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:32,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:32,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:32,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101580697] [2021-05-21 20:35:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:32,259 INFO L87 Difference]: Start difference. First operand 19182 states and 74314 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:32,430 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-05-21 20:35:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:34,666 INFO L93 Difference]: Finished difference Result 43788 states and 155142 transitions. [2021-05-21 20:35:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 20:35:34,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:34,764 INFO L225 Difference]: With dead ends: 43788 [2021-05-21 20:35:34,764 INFO L226 Difference]: Without dead ends: 43753 [2021-05-21 20:35:34,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1584.4ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 20:35:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43753 states. [2021-05-21 20:35:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43753 to 22487. [2021-05-21 20:35:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22487 states, 22486 states have (on average 3.8633816596993684) internal successors, (86872), 22486 states have internal predecessors, (86872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22487 states to 22487 states and 86872 transitions. [2021-05-21 20:35:35,570 INFO L78 Accepts]: Start accepts. Automaton has 22487 states and 86872 transitions. Word has length 25 [2021-05-21 20:35:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:35,570 INFO L482 AbstractCegarLoop]: Abstraction has 22487 states and 86872 transitions. [2021-05-21 20:35:35,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 22487 states and 86872 transitions. [2021-05-21 20:35:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:35,612 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:35,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:35,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:35,813 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:35,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:35,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 50 times [2021-05-21 20:35:35,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:35,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500715569] [2021-05-21 20:35:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:35,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:35,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500715569] [2021-05-21 20:35:35,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500715569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:35,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416513864] [2021-05-21 20:35:35,849 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:35,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:35,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416513864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:35,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:35,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:35,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885350794] [2021-05-21 20:35:35,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:35,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:35,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:35,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:35,969 INFO L87 Difference]: Start difference. First operand 22487 states and 86872 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:37,153 INFO L93 Difference]: Finished difference Result 34933 states and 127285 transitions. [2021-05-21 20:35:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:35:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:37,230 INFO L225 Difference]: With dead ends: 34933 [2021-05-21 20:35:37,230 INFO L226 Difference]: Without dead ends: 34912 [2021-05-21 20:35:37,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 20:35:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34912 states. [2021-05-21 20:35:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34912 to 22735. [2021-05-21 20:35:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22735 states, 22734 states have (on average 3.8544910706430895) internal successors, (87628), 22734 states have internal predecessors, (87628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22735 states to 22735 states and 87628 transitions. [2021-05-21 20:35:37,884 INFO L78 Accepts]: Start accepts. Automaton has 22735 states and 87628 transitions. Word has length 25 [2021-05-21 20:35:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:37,884 INFO L482 AbstractCegarLoop]: Abstraction has 22735 states and 87628 transitions. [2021-05-21 20:35:37,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 22735 states and 87628 transitions. [2021-05-21 20:35:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:37,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:37,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:38,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-21 20:35:38,118 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 51 times [2021-05-21 20:35:38,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:38,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754318739] [2021-05-21 20:35:38,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:38,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754318739] [2021-05-21 20:35:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754318739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478949682] [2021-05-21 20:35:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:35:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:38,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:38,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478949682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:38,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:38,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752383299] [2021-05-21 20:35:38,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:38,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:38,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:38,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:38,283 INFO L87 Difference]: Start difference. First operand 22735 states and 87628 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:39,259 INFO L93 Difference]: Finished difference Result 39052 states and 142123 transitions. [2021-05-21 20:35:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:35:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:39,354 INFO L225 Difference]: With dead ends: 39052 [2021-05-21 20:35:39,354 INFO L226 Difference]: Without dead ends: 39052 [2021-05-21 20:35:39,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:35:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-05-21 20:35:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 23152. [2021-05-21 20:35:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23152 states, 23151 states have (on average 3.8622089758541747) internal successors, (89414), 23151 states have internal predecessors, (89414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23152 states to 23152 states and 89414 transitions. [2021-05-21 20:35:40,082 INFO L78 Accepts]: Start accepts. Automaton has 23152 states and 89414 transitions. Word has length 25 [2021-05-21 20:35:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:40,082 INFO L482 AbstractCegarLoop]: Abstraction has 23152 states and 89414 transitions. [2021-05-21 20:35:40,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23152 states and 89414 transitions. [2021-05-21 20:35:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:40,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:40,116 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:40,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:40,317 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 52 times [2021-05-21 20:35:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774770537] [2021-05-21 20:35:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:40,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:40,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774770537] [2021-05-21 20:35:40,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774770537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:40,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108463654] [2021-05-21 20:35:40,361 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:40,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:40,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:40,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108463654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:40,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:40,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:40,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708476267] [2021-05-21 20:35:40,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:40,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:40,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:40,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:40,532 INFO L87 Difference]: Start difference. First operand 23152 states and 89414 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:42,249 INFO L93 Difference]: Finished difference Result 36484 states and 134220 transitions. [2021-05-21 20:35:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 20:35:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:42,328 INFO L225 Difference]: With dead ends: 36484 [2021-05-21 20:35:42,328 INFO L226 Difference]: Without dead ends: 36484 [2021-05-21 20:35:42,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1158.8ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 20:35:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36484 states. [2021-05-21 20:35:42,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36484 to 23276. [2021-05-21 20:35:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23276 states, 23275 states have (on average 3.866122448979592) internal successors, (89984), 23275 states have internal predecessors, (89984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23276 states to 23276 states and 89984 transitions. [2021-05-21 20:35:42,982 INFO L78 Accepts]: Start accepts. Automaton has 23276 states and 89984 transitions. Word has length 25 [2021-05-21 20:35:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:42,982 INFO L482 AbstractCegarLoop]: Abstraction has 23276 states and 89984 transitions. [2021-05-21 20:35:42,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23276 states and 89984 transitions. [2021-05-21 20:35:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:43,018 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:43,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:43,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 20:35:43,218 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 53 times [2021-05-21 20:35:43,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:43,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001440091] [2021-05-21 20:35:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:43,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:43,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001440091] [2021-05-21 20:35:43,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001440091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:43,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524466608] [2021-05-21 20:35:43,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:43,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 20:35:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:43,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:43,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524466608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:43,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:43,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:43,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497081871] [2021-05-21 20:35:43,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:43,573 INFO L87 Difference]: Start difference. First operand 23276 states and 89984 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:45,331 INFO L93 Difference]: Finished difference Result 36924 states and 135962 transitions. [2021-05-21 20:35:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 20:35:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:45,408 INFO L225 Difference]: With dead ends: 36924 [2021-05-21 20:35:45,408 INFO L226 Difference]: Without dead ends: 36924 [2021-05-21 20:35:45,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 1241.7ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 20:35:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36924 states. [2021-05-21 20:35:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36924 to 23342. [2021-05-21 20:35:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23342 states, 23341 states have (on average 3.8635876783342615) internal successors, (90180), 23341 states have internal predecessors, (90180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23342 states to 23342 states and 90180 transitions. [2021-05-21 20:35:46,109 INFO L78 Accepts]: Start accepts. Automaton has 23342 states and 90180 transitions. Word has length 25 [2021-05-21 20:35:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:46,109 INFO L482 AbstractCegarLoop]: Abstraction has 23342 states and 90180 transitions. [2021-05-21 20:35:46,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23342 states and 90180 transitions. [2021-05-21 20:35:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:46,148 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:46,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:46,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 20:35:46,349 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:46,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 54 times [2021-05-21 20:35:46,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:46,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338694257] [2021-05-21 20:35:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338694257] [2021-05-21 20:35:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338694257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477433023] [2021-05-21 20:35:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:46,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:35:46,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:46,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477433023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:46,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:46,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:46,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76989507] [2021-05-21 20:35:46,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:46,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:46,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:46,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:46,505 INFO L87 Difference]: Start difference. First operand 23342 states and 90180 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:47,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:47,294 INFO L93 Difference]: Finished difference Result 36712 states and 134265 transitions. [2021-05-21 20:35:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:35:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:35:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:47,571 INFO L225 Difference]: With dead ends: 36712 [2021-05-21 20:35:47,571 INFO L226 Difference]: Without dead ends: 36694 [2021-05-21 20:35:47,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 20:35:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36694 states. [2021-05-21 20:35:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36694 to 23302. [2021-05-21 20:35:48,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23302 states, 23301 states have (on average 3.860478091069053) internal successors, (89953), 23301 states have internal predecessors, (89953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23302 states to 23302 states and 89953 transitions. [2021-05-21 20:35:48,242 INFO L78 Accepts]: Start accepts. Automaton has 23302 states and 89953 transitions. Word has length 25 [2021-05-21 20:35:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:48,243 INFO L482 AbstractCegarLoop]: Abstraction has 23302 states and 89953 transitions. [2021-05-21 20:35:48,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:35:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 23302 states and 89953 transitions. [2021-05-21 20:35:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:48,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:48,277 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:48,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:48,479 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 55 times [2021-05-21 20:35:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556331070] [2021-05-21 20:35:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:48,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:48,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556331070] [2021-05-21 20:35:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556331070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:48,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601501652] [2021-05-21 20:35:48,553 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601501652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:48,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:48,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700931337] [2021-05-21 20:35:48,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:48,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:48,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:48,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:48,698 INFO L87 Difference]: Start difference. First operand 23302 states and 89953 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:50,473 INFO L93 Difference]: Finished difference Result 30537 states and 112209 transitions. [2021-05-21 20:35:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 20:35:50,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:50,542 INFO L225 Difference]: With dead ends: 30537 [2021-05-21 20:35:50,542 INFO L226 Difference]: Without dead ends: 30533 [2021-05-21 20:35:50,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1239.9ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 20:35:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30533 states. [2021-05-21 20:35:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30533 to 23633. [2021-05-21 20:35:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23633 states, 23632 states have (on average 3.8681872037914693) internal successors, (91413), 23632 states have internal predecessors, (91413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23633 states to 23633 states and 91413 transitions. [2021-05-21 20:35:51,225 INFO L78 Accepts]: Start accepts. Automaton has 23633 states and 91413 transitions. Word has length 25 [2021-05-21 20:35:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:51,225 INFO L482 AbstractCegarLoop]: Abstraction has 23633 states and 91413 transitions. [2021-05-21 20:35:51,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 23633 states and 91413 transitions. [2021-05-21 20:35:51,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:51,265 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:51,265 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:51,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:51,467 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:51,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:51,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 56 times [2021-05-21 20:35:51,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:51,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504421206] [2021-05-21 20:35:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:51,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504421206] [2021-05-21 20:35:51,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504421206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:51,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906128169] [2021-05-21 20:35:51,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:51,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:35:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:51,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906128169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:51,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:51,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:51,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318344953] [2021-05-21 20:35:51,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:51,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:51,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:51,644 INFO L87 Difference]: Start difference. First operand 23633 states and 91413 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:53,315 INFO L93 Difference]: Finished difference Result 30537 states and 112384 transitions. [2021-05-21 20:35:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 20:35:53,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:53,382 INFO L225 Difference]: With dead ends: 30537 [2021-05-21 20:35:53,383 INFO L226 Difference]: Without dead ends: 30531 [2021-05-21 20:35:53,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 1151.8ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 20:35:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30531 states. [2021-05-21 20:35:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30531 to 23624. [2021-05-21 20:35:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23624 states, 23623 states have (on average 3.866274393599458) internal successors, (91333), 23623 states have internal predecessors, (91333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23624 states to 23624 states and 91333 transitions. [2021-05-21 20:35:53,973 INFO L78 Accepts]: Start accepts. Automaton has 23624 states and 91333 transitions. Word has length 25 [2021-05-21 20:35:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:53,973 INFO L482 AbstractCegarLoop]: Abstraction has 23624 states and 91333 transitions. [2021-05-21 20:35:53,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 23624 states and 91333 transitions. [2021-05-21 20:35:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:54,016 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:54,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:54,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-21 20:35:54,216 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 57 times [2021-05-21 20:35:54,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:54,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692940717] [2021-05-21 20:35:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:54,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:54,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692940717] [2021-05-21 20:35:54,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692940717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:54,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13143139] [2021-05-21 20:35:54,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:54,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:35:54,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13143139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:54,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:54,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:54,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610290573] [2021-05-21 20:35:54,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:54,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:54,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:54,395 INFO L87 Difference]: Start difference. First operand 23624 states and 91333 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:55,818 INFO L93 Difference]: Finished difference Result 26398 states and 99464 transitions. [2021-05-21 20:35:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:35:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:55,881 INFO L225 Difference]: With dead ends: 26398 [2021-05-21 20:35:55,881 INFO L226 Difference]: Without dead ends: 26377 [2021-05-21 20:35:55,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 20:35:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26377 states. [2021-05-21 20:35:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26377 to 23720. [2021-05-21 20:35:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23720 states, 23719 states have (on average 3.8643281757241033) internal successors, (91658), 23719 states have internal predecessors, (91658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23720 states to 23720 states and 91658 transitions. [2021-05-21 20:35:56,487 INFO L78 Accepts]: Start accepts. Automaton has 23720 states and 91658 transitions. Word has length 25 [2021-05-21 20:35:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:56,487 INFO L482 AbstractCegarLoop]: Abstraction has 23720 states and 91658 transitions. [2021-05-21 20:35:56,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 23720 states and 91658 transitions. [2021-05-21 20:35:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:56,525 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:56,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:56,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:56,726 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:56,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:56,726 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 58 times [2021-05-21 20:35:56,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:56,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339820361] [2021-05-21 20:35:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:56,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339820361] [2021-05-21 20:35:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339820361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739143505] [2021-05-21 20:35:56,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:56,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:35:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:35:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:56,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739143505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:56,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:56,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:35:56,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709579505] [2021-05-21 20:35:56,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:35:56,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:35:56,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:35:56,897 INFO L87 Difference]: Start difference. First operand 23720 states and 91658 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:58,114 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-21 20:35:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:35:58,537 INFO L93 Difference]: Finished difference Result 26773 states and 100488 transitions. [2021-05-21 20:35:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 20:35:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:35:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:35:58,598 INFO L225 Difference]: With dead ends: 26773 [2021-05-21 20:35:58,598 INFO L226 Difference]: Without dead ends: 26767 [2021-05-21 20:35:58,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1136.5ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 20:35:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-05-21 20:35:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 23647. [2021-05-21 20:35:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23647 states, 23646 states have (on average 3.8645859764865094) internal successors, (91382), 23646 states have internal predecessors, (91382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23647 states to 23647 states and 91382 transitions. [2021-05-21 20:35:59,216 INFO L78 Accepts]: Start accepts. Automaton has 23647 states and 91382 transitions. Word has length 25 [2021-05-21 20:35:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:35:59,217 INFO L482 AbstractCegarLoop]: Abstraction has 23647 states and 91382 transitions. [2021-05-21 20:35:59,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:35:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23647 states and 91382 transitions. [2021-05-21 20:35:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:35:59,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:35:59,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:35:59,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:59,459 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:35:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:35:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 59 times [2021-05-21 20:35:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:35:59,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293397423] [2021-05-21 20:35:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:35:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:35:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:59,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:35:59,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293397423] [2021-05-21 20:35:59,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293397423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:59,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786705363] [2021-05-21 20:35:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:35:59,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:35:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:35:59,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:35:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:35:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:35:59,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786705363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:35:59,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:35:59,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:35:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169896246] [2021-05-21 20:35:59,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:35:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:35:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:35:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:35:59,632 INFO L87 Difference]: Start difference. First operand 23647 states and 91382 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:36:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:00,284 INFO L93 Difference]: Finished difference Result 34026 states and 126260 transitions. [2021-05-21 20:36:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:36:00,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:36:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:00,357 INFO L225 Difference]: With dead ends: 34026 [2021-05-21 20:36:00,357 INFO L226 Difference]: Without dead ends: 33998 [2021-05-21 20:36:00,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 20:36:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33998 states. [2021-05-21 20:36:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33998 to 23641. [2021-05-21 20:36:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23641 states, 23640 states have (on average 3.8629441624365484) internal successors, (91320), 23640 states have internal predecessors, (91320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23641 states to 23641 states and 91320 transitions. [2021-05-21 20:36:01,064 INFO L78 Accepts]: Start accepts. Automaton has 23641 states and 91320 transitions. Word has length 25 [2021-05-21 20:36:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:01,064 INFO L482 AbstractCegarLoop]: Abstraction has 23641 states and 91320 transitions. [2021-05-21 20:36:01,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:36:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 23641 states and 91320 transitions. [2021-05-21 20:36:01,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:01,101 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:01,101 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:01,305 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 60 times [2021-05-21 20:36:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061788406] [2021-05-21 20:36:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:01,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:01,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061788406] [2021-05-21 20:36:01,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061788406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70829394] [2021-05-21 20:36:01,345 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:01,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:01,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70829394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:01,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:01,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:01,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937704395] [2021-05-21 20:36:01,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:01,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:01,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:01,500 INFO L87 Difference]: Start difference. First operand 23641 states and 91320 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:02,602 INFO L93 Difference]: Finished difference Result 27117 states and 102184 transitions. [2021-05-21 20:36:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:36:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:02,663 INFO L225 Difference]: With dead ends: 27117 [2021-05-21 20:36:02,664 INFO L226 Difference]: Without dead ends: 27075 [2021-05-21 20:36:02,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 651.5ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:36:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27075 states. [2021-05-21 20:36:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27075 to 23872. [2021-05-21 20:36:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23872 states, 23871 states have (on average 3.8621339700892294) internal successors, (92193), 23871 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23872 states to 23872 states and 92193 transitions. [2021-05-21 20:36:03,198 INFO L78 Accepts]: Start accepts. Automaton has 23872 states and 92193 transitions. Word has length 25 [2021-05-21 20:36:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:03,199 INFO L482 AbstractCegarLoop]: Abstraction has 23872 states and 92193 transitions. [2021-05-21 20:36:03,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 23872 states and 92193 transitions. [2021-05-21 20:36:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:03,232 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:03,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:03,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-05-21 20:36:03,433 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 61 times [2021-05-21 20:36:03,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:03,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758060220] [2021-05-21 20:36:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:03,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758060220] [2021-05-21 20:36:03,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758060220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:03,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645356060] [2021-05-21 20:36:03,478 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645356060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:03,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:03,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:03,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889395054] [2021-05-21 20:36:03,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:03,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:03,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:03,615 INFO L87 Difference]: Start difference. First operand 23872 states and 92193 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:04,870 INFO L93 Difference]: Finished difference Result 28292 states and 105726 transitions. [2021-05-21 20:36:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 20:36:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:04,933 INFO L225 Difference]: With dead ends: 28292 [2021-05-21 20:36:04,933 INFO L226 Difference]: Without dead ends: 28257 [2021-05-21 20:36:04,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 20:36:04,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28257 states. [2021-05-21 20:36:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28257 to 24245. [2021-05-21 20:36:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24245 states, 24244 states have (on average 3.8590166639168455) internal successors, (93558), 24244 states have internal predecessors, (93558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:05,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24245 states to 24245 states and 93558 transitions. [2021-05-21 20:36:05,617 INFO L78 Accepts]: Start accepts. Automaton has 24245 states and 93558 transitions. Word has length 25 [2021-05-21 20:36:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:05,617 INFO L482 AbstractCegarLoop]: Abstraction has 24245 states and 93558 transitions. [2021-05-21 20:36:05,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 24245 states and 93558 transitions. [2021-05-21 20:36:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:05,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:05,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:05,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 20:36:05,875 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:05,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 62 times [2021-05-21 20:36:05,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:05,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213012096] [2021-05-21 20:36:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:05,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213012096] [2021-05-21 20:36:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213012096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786242101] [2021-05-21 20:36:05,915 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:06,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786242101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:06,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:06,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:06,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50819402] [2021-05-21 20:36:06,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:06,068 INFO L87 Difference]: Start difference. First operand 24245 states and 93558 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:07,433 INFO L93 Difference]: Finished difference Result 28749 states and 107022 transitions. [2021-05-21 20:36:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:36:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:07,501 INFO L225 Difference]: With dead ends: 28749 [2021-05-21 20:36:07,501 INFO L226 Difference]: Without dead ends: 28749 [2021-05-21 20:36:07,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 20:36:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28749 states. [2021-05-21 20:36:08,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28749 to 24026. [2021-05-21 20:36:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.861893860561915) internal successors, (92782), 24025 states have internal predecessors, (92782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 92782 transitions. [2021-05-21 20:36:08,095 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 92782 transitions. Word has length 25 [2021-05-21 20:36:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:08,095 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 92782 transitions. [2021-05-21 20:36:08,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 92782 transitions. [2021-05-21 20:36:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:08,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:08,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:08,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 20:36:08,335 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:08,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 63 times [2021-05-21 20:36:08,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:08,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099561477] [2021-05-21 20:36:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:08,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:08,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099561477] [2021-05-21 20:36:08,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099561477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:08,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182174462] [2021-05-21 20:36:08,382 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:36:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:08,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:08,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182174462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:08,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:08,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:08,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036489728] [2021-05-21 20:36:08,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:08,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:08,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:08,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:08,530 INFO L87 Difference]: Start difference. First operand 24026 states and 92782 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:08,778 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-21 20:36:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:09,971 INFO L93 Difference]: Finished difference Result 29221 states and 108781 transitions. [2021-05-21 20:36:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:36:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:10,035 INFO L225 Difference]: With dead ends: 29221 [2021-05-21 20:36:10,035 INFO L226 Difference]: Without dead ends: 29217 [2021-05-21 20:36:10,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 953.3ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 20:36:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29217 states. [2021-05-21 20:36:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29217 to 24082. [2021-05-21 20:36:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8637099788214777) internal successors, (93042), 24081 states have internal predecessors, (93042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 93042 transitions. [2021-05-21 20:36:10,583 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 93042 transitions. Word has length 25 [2021-05-21 20:36:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:10,583 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 93042 transitions. [2021-05-21 20:36:10,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 93042 transitions. [2021-05-21 20:36:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:10,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:10,620 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:10,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 20:36:10,820 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:10,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:10,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 64 times [2021-05-21 20:36:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:10,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845536770] [2021-05-21 20:36:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:10,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:10,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845536770] [2021-05-21 20:36:10,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845536770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:10,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249021876] [2021-05-21 20:36:10,856 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:10,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249021876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:10,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:10,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:36:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347415223] [2021-05-21 20:36:10,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:36:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:36:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:36:10,995 INFO L87 Difference]: Start difference. First operand 24082 states and 93042 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:12,391 INFO L93 Difference]: Finished difference Result 29744 states and 110313 transitions. [2021-05-21 20:36:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 20:36:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:12,458 INFO L225 Difference]: With dead ends: 29744 [2021-05-21 20:36:12,458 INFO L226 Difference]: Without dead ends: 29744 [2021-05-21 20:36:12,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 828.5ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 20:36:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29744 states. [2021-05-21 20:36:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29744 to 24037. [2021-05-21 20:36:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8625395240472624) internal successors, (92840), 24036 states have internal predecessors, (92840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92840 transitions. [2021-05-21 20:36:13,073 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92840 transitions. Word has length 25 [2021-05-21 20:36:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:13,073 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92840 transitions. [2021-05-21 20:36:13,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92840 transitions. [2021-05-21 20:36:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:13,112 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:13,112 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:13,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 20:36:13,312 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1922178658, now seen corresponding path program 65 times [2021-05-21 20:36:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993784196] [2021-05-21 20:36:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:13,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993784196] [2021-05-21 20:36:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993784196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217643010] [2021-05-21 20:36:13,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:13,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 20:36:13,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:13,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:13,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217643010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:13,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:13,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871496420] [2021-05-21 20:36:13,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:13,526 INFO L87 Difference]: Start difference. First operand 24037 states and 92840 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:14,323 INFO L93 Difference]: Finished difference Result 27264 states and 102651 transitions. [2021-05-21 20:36:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:36:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:14,384 INFO L225 Difference]: With dead ends: 27264 [2021-05-21 20:36:14,384 INFO L226 Difference]: Without dead ends: 27186 [2021-05-21 20:36:14,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:36:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27186 states. [2021-05-21 20:36:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27186 to 24037. [2021-05-21 20:36:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24037 states, 24036 states have (on average 3.8620402729239474) internal successors, (92828), 24036 states have internal predecessors, (92828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24037 states to 24037 states and 92828 transitions. [2021-05-21 20:36:15,000 INFO L78 Accepts]: Start accepts. Automaton has 24037 states and 92828 transitions. Word has length 25 [2021-05-21 20:36:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:15,000 INFO L482 AbstractCegarLoop]: Abstraction has 24037 states and 92828 transitions. [2021-05-21 20:36:15,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:15,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24037 states and 92828 transitions. [2021-05-21 20:36:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:15,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:15,035 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:15,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:15,235 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:15,236 INFO L82 PathProgramCache]: Analyzing trace with hash -516161122, now seen corresponding path program 66 times [2021-05-21 20:36:15,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:15,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411613856] [2021-05-21 20:36:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411613856] [2021-05-21 20:36:15,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411613856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121300044] [2021-05-21 20:36:15,295 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:15,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:36:15,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:15,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:15,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121300044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:15,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:15,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411677018] [2021-05-21 20:36:15,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:15,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:15,434 INFO L87 Difference]: Start difference. First operand 24037 states and 92828 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,043 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-21 20:36:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:16,311 INFO L93 Difference]: Finished difference Result 27092 states and 102183 transitions. [2021-05-21 20:36:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:36:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:16,374 INFO L225 Difference]: With dead ends: 27092 [2021-05-21 20:36:16,374 INFO L226 Difference]: Without dead ends: 27014 [2021-05-21 20:36:16,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=431, Invalid=1375, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 20:36:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27014 states. [2021-05-21 20:36:16,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27014 to 24197. [2021-05-21 20:36:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 3.8581997024301535) internal successors, (93353), 24196 states have internal predecessors, (93353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 93353 transitions. [2021-05-21 20:36:16,827 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 93353 transitions. Word has length 25 [2021-05-21 20:36:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:16,827 INFO L482 AbstractCegarLoop]: Abstraction has 24197 states and 93353 transitions. [2021-05-21 20:36:16,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 93353 transitions. [2021-05-21 20:36:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:17,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:17,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:17,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-21 20:36:17,223 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:17,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1450570906, now seen corresponding path program 67 times [2021-05-21 20:36:17,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:17,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882833268] [2021-05-21 20:36:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:17,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882833268] [2021-05-21 20:36:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882833268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178080565] [2021-05-21 20:36:17,262 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178080565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:17,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:17,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:17,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40710328] [2021-05-21 20:36:17,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:17,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:17,403 INFO L87 Difference]: Start difference. First operand 24197 states and 93353 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:18,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:18,377 INFO L93 Difference]: Finished difference Result 29237 states and 108599 transitions. [2021-05-21 20:36:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:36:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:18,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:18,444 INFO L225 Difference]: With dead ends: 29237 [2021-05-21 20:36:18,444 INFO L226 Difference]: Without dead ends: 29132 [2021-05-21 20:36:18,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 20:36:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29132 states. [2021-05-21 20:36:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29132 to 24578. [2021-05-21 20:36:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24578 states, 24577 states have (on average 3.8505920169263947) internal successors, (94636), 24577 states have internal predecessors, (94636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24578 states to 24578 states and 94636 transitions. [2021-05-21 20:36:19,147 INFO L78 Accepts]: Start accepts. Automaton has 24578 states and 94636 transitions. Word has length 25 [2021-05-21 20:36:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:19,147 INFO L482 AbstractCegarLoop]: Abstraction has 24578 states and 94636 transitions. [2021-05-21 20:36:19,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 24578 states and 94636 transitions. [2021-05-21 20:36:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:19,190 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:19,190 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:19,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 20:36:19,390 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:19,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1651929958, now seen corresponding path program 68 times [2021-05-21 20:36:19,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:19,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483252668] [2021-05-21 20:36:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:19,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:19,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483252668] [2021-05-21 20:36:19,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483252668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069009468] [2021-05-21 20:36:19,427 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:19,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:19,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:19,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:19,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069009468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:19,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:19,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:19,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516318828] [2021-05-21 20:36:19,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:19,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:19,584 INFO L87 Difference]: Start difference. First operand 24578 states and 94636 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:20,321 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-21 20:36:20,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:20,852 INFO L93 Difference]: Finished difference Result 30260 states and 111728 transitions. [2021-05-21 20:36:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 20:36:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:20,918 INFO L225 Difference]: With dead ends: 30260 [2021-05-21 20:36:20,918 INFO L226 Difference]: Without dead ends: 30225 [2021-05-21 20:36:20,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 924.6ms TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:36:20,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2021-05-21 20:36:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 25387. [2021-05-21 20:36:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25387 states, 25386 states have (on average 3.8439691168360515) internal successors, (97583), 25386 states have internal predecessors, (97583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25387 states to 25387 states and 97583 transitions. [2021-05-21 20:36:21,574 INFO L78 Accepts]: Start accepts. Automaton has 25387 states and 97583 transitions. Word has length 25 [2021-05-21 20:36:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:21,574 INFO L482 AbstractCegarLoop]: Abstraction has 25387 states and 97583 transitions. [2021-05-21 20:36:21,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 25387 states and 97583 transitions. [2021-05-21 20:36:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:21,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:21,620 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:21,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:21,821 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:21,821 INFO L82 PathProgramCache]: Analyzing trace with hash -547335266, now seen corresponding path program 69 times [2021-05-21 20:36:21,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:21,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570858478] [2021-05-21 20:36:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:21,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:21,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570858478] [2021-05-21 20:36:21,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570858478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:21,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372941854] [2021-05-21 20:36:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:21,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:36:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372941854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:22,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:22,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:22,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950280807] [2021-05-21 20:36:22,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:22,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:22,027 INFO L87 Difference]: Start difference. First operand 25387 states and 97583 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:23,504 INFO L93 Difference]: Finished difference Result 30555 states and 112516 transitions. [2021-05-21 20:36:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:36:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:23,571 INFO L225 Difference]: With dead ends: 30555 [2021-05-21 20:36:23,572 INFO L226 Difference]: Without dead ends: 30555 [2021-05-21 20:36:23,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 20:36:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2021-05-21 20:36:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 24735. [2021-05-21 20:36:24,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24735 states, 24734 states have (on average 3.8523894234656746) internal successors, (95285), 24734 states have internal predecessors, (95285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24735 states to 24735 states and 95285 transitions. [2021-05-21 20:36:24,103 INFO L78 Accepts]: Start accepts. Automaton has 24735 states and 95285 transitions. Word has length 25 [2021-05-21 20:36:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:24,103 INFO L482 AbstractCegarLoop]: Abstraction has 24735 states and 95285 transitions. [2021-05-21 20:36:24,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 24735 states and 95285 transitions. [2021-05-21 20:36:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:24,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:24,141 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:24,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:24,341 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 70 times [2021-05-21 20:36:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:24,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149465776] [2021-05-21 20:36:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:24,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:24,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149465776] [2021-05-21 20:36:24,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149465776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:24,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793263338] [2021-05-21 20:36:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:24,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:24,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793263338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:24,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:24,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434354163] [2021-05-21 20:36:24,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:24,511 INFO L87 Difference]: Start difference. First operand 24735 states and 95285 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:25,432 INFO L93 Difference]: Finished difference Result 29274 states and 109319 transitions. [2021-05-21 20:36:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 20:36:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:25,504 INFO L225 Difference]: With dead ends: 29274 [2021-05-21 20:36:25,504 INFO L226 Difference]: Without dead ends: 29190 [2021-05-21 20:36:25,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:36:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29190 states. [2021-05-21 20:36:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29190 to 24885. [2021-05-21 20:36:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24885 states, 24884 states have (on average 3.8572174891496545) internal successors, (95983), 24884 states have internal predecessors, (95983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24885 states to 24885 states and 95983 transitions. [2021-05-21 20:36:26,235 INFO L78 Accepts]: Start accepts. Automaton has 24885 states and 95983 transitions. Word has length 25 [2021-05-21 20:36:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 24885 states and 95983 transitions. [2021-05-21 20:36:26,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24885 states and 95983 transitions. [2021-05-21 20:36:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:26,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:26,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:26,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:26,485 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 71 times [2021-05-21 20:36:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:26,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853417342] [2021-05-21 20:36:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:26,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:26,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853417342] [2021-05-21 20:36:26,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853417342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:26,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367035828] [2021-05-21 20:36:26,523 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:26,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:26,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367035828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:26,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:26,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:26,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264795599] [2021-05-21 20:36:26,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:26,654 INFO L87 Difference]: Start difference. First operand 24885 states and 95983 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:27,863 INFO L93 Difference]: Finished difference Result 30288 states and 112309 transitions. [2021-05-21 20:36:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:36:27,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:27,935 INFO L225 Difference]: With dead ends: 30288 [2021-05-21 20:36:27,935 INFO L226 Difference]: Without dead ends: 30239 [2021-05-21 20:36:27,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 811.2ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:36:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30239 states. [2021-05-21 20:36:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30239 to 25177. [2021-05-21 20:36:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25177 states, 25176 states have (on average 3.852240228789323) internal successors, (96984), 25176 states have internal predecessors, (96984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25177 states to 25177 states and 96984 transitions. [2021-05-21 20:36:28,696 INFO L78 Accepts]: Start accepts. Automaton has 25177 states and 96984 transitions. Word has length 25 [2021-05-21 20:36:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:28,696 INFO L482 AbstractCegarLoop]: Abstraction has 25177 states and 96984 transitions. [2021-05-21 20:36:28,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25177 states and 96984 transitions. [2021-05-21 20:36:28,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:28,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:28,741 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:28,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:28,941 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:28,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 72 times [2021-05-21 20:36:28,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:28,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126941331] [2021-05-21 20:36:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:28,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126941331] [2021-05-21 20:36:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126941331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:28,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615195020] [2021-05-21 20:36:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:29,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:36:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:29,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615195020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755694803] [2021-05-21 20:36:29,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:29,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:29,110 INFO L87 Difference]: Start difference. First operand 25177 states and 96984 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:30,429 INFO L93 Difference]: Finished difference Result 30750 states and 113565 transitions. [2021-05-21 20:36:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 20:36:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:30,495 INFO L225 Difference]: With dead ends: 30750 [2021-05-21 20:36:30,495 INFO L226 Difference]: Without dead ends: 30750 [2021-05-21 20:36:30,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 881.9ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 20:36:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2021-05-21 20:36:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 24767. [2021-05-21 20:36:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24767 states, 24766 states have (on average 3.85887910845514) internal successors, (95569), 24766 states have internal predecessors, (95569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24767 states to 24767 states and 95569 transitions. [2021-05-21 20:36:31,146 INFO L78 Accepts]: Start accepts. Automaton has 24767 states and 95569 transitions. Word has length 25 [2021-05-21 20:36:31,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:31,146 INFO L482 AbstractCegarLoop]: Abstraction has 24767 states and 95569 transitions. [2021-05-21 20:36:31,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 24767 states and 95569 transitions. [2021-05-21 20:36:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:31,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:31,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:31,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 20:36:31,385 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 73 times [2021-05-21 20:36:31,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:31,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14580736] [2021-05-21 20:36:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:31,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:31,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14580736] [2021-05-21 20:36:31,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14580736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:31,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139024884] [2021-05-21 20:36:31,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139024884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:31,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:31,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574078594] [2021-05-21 20:36:31,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:31,572 INFO L87 Difference]: Start difference. First operand 24767 states and 95569 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:31,992 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-05-21 20:36:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:32,952 INFO L93 Difference]: Finished difference Result 29361 states and 109742 transitions. [2021-05-21 20:36:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 20:36:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:33,013 INFO L225 Difference]: With dead ends: 29361 [2021-05-21 20:36:33,013 INFO L226 Difference]: Without dead ends: 29361 [2021-05-21 20:36:33,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 942.8ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 20:36:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29361 states. [2021-05-21 20:36:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29361 to 25043. [2021-05-21 20:36:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25043 states, 25042 states have (on average 3.864188163884674) internal successors, (96767), 25042 states have internal predecessors, (96767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25043 states to 25043 states and 96767 transitions. [2021-05-21 20:36:33,654 INFO L78 Accepts]: Start accepts. Automaton has 25043 states and 96767 transitions. Word has length 25 [2021-05-21 20:36:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:33,654 INFO L482 AbstractCegarLoop]: Abstraction has 25043 states and 96767 transitions. [2021-05-21 20:36:33,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 25043 states and 96767 transitions. [2021-05-21 20:36:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:33,696 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:33,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:33,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 20:36:33,896 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 74 times [2021-05-21 20:36:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:33,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161511808] [2021-05-21 20:36:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:33,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:33,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161511808] [2021-05-21 20:36:33,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161511808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:33,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097477410] [2021-05-21 20:36:33,933 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:33,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:33,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:34,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097477410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:34,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:34,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:34,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972434106] [2021-05-21 20:36:34,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:34,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:34,070 INFO L87 Difference]: Start difference. First operand 25043 states and 96767 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:35,258 INFO L93 Difference]: Finished difference Result 28982 states and 108706 transitions. [2021-05-21 20:36:35,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:36:35,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:35,332 INFO L225 Difference]: With dead ends: 28982 [2021-05-21 20:36:35,332 INFO L226 Difference]: Without dead ends: 28947 [2021-05-21 20:36:35,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:36:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28947 states. [2021-05-21 20:36:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28947 to 25033. [2021-05-21 20:36:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.8635346756152127) internal successors, (96712), 25032 states have internal predecessors, (96712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 96712 transitions. [2021-05-21 20:36:35,956 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 96712 transitions. Word has length 25 [2021-05-21 20:36:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:35,956 INFO L482 AbstractCegarLoop]: Abstraction has 25033 states and 96712 transitions. [2021-05-21 20:36:35,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 96712 transitions. [2021-05-21 20:36:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:36,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:36,000 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:36,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 20:36:36,200 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 75 times [2021-05-21 20:36:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:36,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607248445] [2021-05-21 20:36:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:36,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607248445] [2021-05-21 20:36:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607248445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271950060] [2021-05-21 20:36:36,235 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:36,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:36:36,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271950060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:36,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:36,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:36,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194001004] [2021-05-21 20:36:36,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:36,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:36,366 INFO L87 Difference]: Start difference. First operand 25033 states and 96712 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:37,909 INFO L93 Difference]: Finished difference Result 33306 states and 122305 transitions. [2021-05-21 20:36:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 20:36:37,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:37,988 INFO L225 Difference]: With dead ends: 33306 [2021-05-21 20:36:37,988 INFO L226 Difference]: Without dead ends: 33306 [2021-05-21 20:36:37,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:36:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33306 states. [2021-05-21 20:36:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33306 to 25063. [2021-05-21 20:36:38,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25063 states, 25062 states have (on average 3.864855159205171) internal successors, (96861), 25062 states have internal predecessors, (96861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25063 states to 25063 states and 96861 transitions. [2021-05-21 20:36:38,663 INFO L78 Accepts]: Start accepts. Automaton has 25063 states and 96861 transitions. Word has length 25 [2021-05-21 20:36:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:38,663 INFO L482 AbstractCegarLoop]: Abstraction has 25063 states and 96861 transitions. [2021-05-21 20:36:38,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 25063 states and 96861 transitions. [2021-05-21 20:36:38,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:38,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:38,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:38,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 20:36:38,915 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:38,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 76 times [2021-05-21 20:36:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:38,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743439236] [2021-05-21 20:36:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:38,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743439236] [2021-05-21 20:36:38,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743439236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:38,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382844964] [2021-05-21 20:36:38,950 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:38,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:38,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:38,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:39,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382844964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:39,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:39,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:39,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481354551] [2021-05-21 20:36:39,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:39,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:39,081 INFO L87 Difference]: Start difference. First operand 25063 states and 96861 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:39,895 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-21 20:36:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:40,605 INFO L93 Difference]: Finished difference Result 33343 states and 122559 transitions. [2021-05-21 20:36:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 20:36:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:40,680 INFO L225 Difference]: With dead ends: 33343 [2021-05-21 20:36:40,681 INFO L226 Difference]: Without dead ends: 33343 [2021-05-21 20:36:40,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:36:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33343 states. [2021-05-21 20:36:41,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33343 to 25038. [2021-05-21 20:36:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 3.8631625194711825) internal successors, (96722), 25037 states have internal predecessors, (96722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 96722 transitions. [2021-05-21 20:36:41,384 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 96722 transitions. Word has length 25 [2021-05-21 20:36:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:41,384 INFO L482 AbstractCegarLoop]: Abstraction has 25038 states and 96722 transitions. [2021-05-21 20:36:41,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:41,385 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 96722 transitions. [2021-05-21 20:36:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:41,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:41,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:41,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-21 20:36:41,635 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:41,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 77 times [2021-05-21 20:36:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:41,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142047839] [2021-05-21 20:36:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:41,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142047839] [2021-05-21 20:36:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142047839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646091844] [2021-05-21 20:36:41,672 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:41,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:41,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:41,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:41,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646091844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:41,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:41,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785104461] [2021-05-21 20:36:41,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:41,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:41,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:41,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:41,821 INFO L87 Difference]: Start difference. First operand 25038 states and 96722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:42,781 INFO L93 Difference]: Finished difference Result 29062 states and 108937 transitions. [2021-05-21 20:36:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:36:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:42,850 INFO L225 Difference]: With dead ends: 29062 [2021-05-21 20:36:42,851 INFO L226 Difference]: Without dead ends: 29027 [2021-05-21 20:36:42,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:36:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29027 states. [2021-05-21 20:36:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29027 to 25065. [2021-05-21 20:36:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25065 states, 25064 states have (on average 3.8628311522502394) internal successors, (96818), 25064 states have internal predecessors, (96818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25065 states to 25065 states and 96818 transitions. [2021-05-21 20:36:43,591 INFO L78 Accepts]: Start accepts. Automaton has 25065 states and 96818 transitions. Word has length 25 [2021-05-21 20:36:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:43,591 INFO L482 AbstractCegarLoop]: Abstraction has 25065 states and 96818 transitions. [2021-05-21 20:36:43,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 25065 states and 96818 transitions. [2021-05-21 20:36:43,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:43,637 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:43,637 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:43,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-21 20:36:43,838 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 78 times [2021-05-21 20:36:43,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:43,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729253463] [2021-05-21 20:36:43,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:43,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729253463] [2021-05-21 20:36:43,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729253463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421089623] [2021-05-21 20:36:43,873 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:43,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:43,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:43,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:44,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421089623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:44,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:44,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168206336] [2021-05-21 20:36:44,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:44,039 INFO L87 Difference]: Start difference. First operand 25065 states and 96818 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:45,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:45,495 INFO L93 Difference]: Finished difference Result 29427 states and 110008 transitions. [2021-05-21 20:36:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 20:36:45,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:45,564 INFO L225 Difference]: With dead ends: 29427 [2021-05-21 20:36:45,564 INFO L226 Difference]: Without dead ends: 29427 [2021-05-21 20:36:45,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 985.2ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 20:36:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29427 states. [2021-05-21 20:36:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29427 to 25026. [2021-05-21 20:36:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25026 states, 25025 states have (on average 3.863256743256743) internal successors, (96678), 25025 states have internal predecessors, (96678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25026 states to 25026 states and 96678 transitions. [2021-05-21 20:36:46,225 INFO L78 Accepts]: Start accepts. Automaton has 25026 states and 96678 transitions. Word has length 25 [2021-05-21 20:36:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:46,226 INFO L482 AbstractCegarLoop]: Abstraction has 25026 states and 96678 transitions. [2021-05-21 20:36:46,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 25026 states and 96678 transitions. [2021-05-21 20:36:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:46,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:46,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:46,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:46,473 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2042881808, now seen corresponding path program 47 times [2021-05-21 20:36:46,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:46,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004573052] [2021-05-21 20:36:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:46,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004573052] [2021-05-21 20:36:46,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004573052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099901620] [2021-05-21 20:36:46,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:46,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:36:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:46,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099901620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:46,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:46,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-21 20:36:46,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189834640] [2021-05-21 20:36:46,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 20:36:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 20:36:46,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-21 20:36:46,620 INFO L87 Difference]: Start difference. First operand 25026 states and 96678 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:47,002 INFO L93 Difference]: Finished difference Result 35828 states and 129668 transitions. [2021-05-21 20:36:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 20:36:47,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:47,080 INFO L225 Difference]: With dead ends: 35828 [2021-05-21 20:36:47,080 INFO L226 Difference]: Without dead ends: 35821 [2021-05-21 20:36:47,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-21 20:36:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35821 states. [2021-05-21 20:36:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35821 to 24552. [2021-05-21 20:36:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24552 states, 24551 states have (on average 3.8637937354893896) internal successors, (94860), 24551 states have internal predecessors, (94860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24552 states to 24552 states and 94860 transitions. [2021-05-21 20:36:47,863 INFO L78 Accepts]: Start accepts. Automaton has 24552 states and 94860 transitions. Word has length 25 [2021-05-21 20:36:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:47,863 INFO L482 AbstractCegarLoop]: Abstraction has 24552 states and 94860 transitions. [2021-05-21 20:36:47,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24552 states and 94860 transitions. [2021-05-21 20:36:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:47,904 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:47,904 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:48,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:48,104 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -630380332, now seen corresponding path program 48 times [2021-05-21 20:36:48,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:48,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141992205] [2021-05-21 20:36:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:48,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141992205] [2021-05-21 20:36:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141992205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361424602] [2021-05-21 20:36:48,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:48,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:36:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:36:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:48,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361424602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:48,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:48,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:36:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857679319] [2021-05-21 20:36:48,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:36:48,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:36:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:48,244 INFO L87 Difference]: Start difference. First operand 24552 states and 94860 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:48,639 INFO L93 Difference]: Finished difference Result 44652 states and 164681 transitions. [2021-05-21 20:36:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:36:48,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:48,752 INFO L225 Difference]: With dead ends: 44652 [2021-05-21 20:36:48,752 INFO L226 Difference]: Without dead ends: 44652 [2021-05-21 20:36:48,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:36:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44652 states. [2021-05-21 20:36:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44652 to 32844. [2021-05-21 20:36:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32844 states, 32843 states have (on average 3.910117833328259) internal successors, (128420), 32843 states have internal predecessors, (128420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32844 states to 32844 states and 128420 transitions. [2021-05-21 20:36:49,813 INFO L78 Accepts]: Start accepts. Automaton has 32844 states and 128420 transitions. Word has length 25 [2021-05-21 20:36:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:49,813 INFO L482 AbstractCegarLoop]: Abstraction has 32844 states and 128420 transitions. [2021-05-21 20:36:49,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:49,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32844 states and 128420 transitions. [2021-05-21 20:36:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:49,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:49,869 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:50,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:50,070 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:50,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:50,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1477189716, now seen corresponding path program 49 times [2021-05-21 20:36:50,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:50,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526226481] [2021-05-21 20:36:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526226481] [2021-05-21 20:36:50,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526226481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173805753] [2021-05-21 20:36:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:50,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:50,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173805753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:50,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:50,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:50,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562897614] [2021-05-21 20:36:50,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:50,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:50,491 INFO L87 Difference]: Start difference. First operand 32844 states and 128420 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:51,153 INFO L93 Difference]: Finished difference Result 33629 states and 130552 transitions. [2021-05-21 20:36:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:36:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:51,237 INFO L225 Difference]: With dead ends: 33629 [2021-05-21 20:36:51,237 INFO L226 Difference]: Without dead ends: 33615 [2021-05-21 20:36:51,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:36:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33615 states. [2021-05-21 20:36:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33615 to 33084. [2021-05-21 20:36:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33084 states, 33083 states have (on average 3.9054499289665388) internal successors, (129204), 33083 states have internal predecessors, (129204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33084 states to 33084 states and 129204 transitions. [2021-05-21 20:36:52,057 INFO L78 Accepts]: Start accepts. Automaton has 33084 states and 129204 transitions. Word has length 25 [2021-05-21 20:36:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:52,057 INFO L482 AbstractCegarLoop]: Abstraction has 33084 states and 129204 transitions. [2021-05-21 20:36:52,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 33084 states and 129204 transitions. [2021-05-21 20:36:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:52,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:52,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:52,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:52,317 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1713182888, now seen corresponding path program 50 times [2021-05-21 20:36:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:52,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764568729] [2021-05-21 20:36:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:52,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764568729] [2021-05-21 20:36:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764568729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:52,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312633704] [2021-05-21 20:36:52,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:52,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:36:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:36:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:52,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312633704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:52,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:52,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:36:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328786180] [2021-05-21 20:36:52,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:36:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:36:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:36:52,494 INFO L87 Difference]: Start difference. First operand 33084 states and 129204 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:53,224 INFO L93 Difference]: Finished difference Result 33760 states and 130979 transitions. [2021-05-21 20:36:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:36:53,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:53,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:53,313 INFO L225 Difference]: With dead ends: 33760 [2021-05-21 20:36:53,313 INFO L226 Difference]: Without dead ends: 33754 [2021-05-21 20:36:53,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:36:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33754 states. [2021-05-21 20:36:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33754 to 33087. [2021-05-21 20:36:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33087 states, 33086 states have (on average 3.9052469322372) internal successors, (129209), 33086 states have internal predecessors, (129209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33087 states to 33087 states and 129209 transitions. [2021-05-21 20:36:54,315 INFO L78 Accepts]: Start accepts. Automaton has 33087 states and 129209 transitions. Word has length 25 [2021-05-21 20:36:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:54,315 INFO L482 AbstractCegarLoop]: Abstraction has 33087 states and 129209 transitions. [2021-05-21 20:36:54,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 33087 states and 129209 transitions. [2021-05-21 20:36:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:54,382 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:54,382 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:54,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:54,582 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash 889676572, now seen corresponding path program 51 times [2021-05-21 20:36:54,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:54,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790064807] [2021-05-21 20:36:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:54,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790064807] [2021-05-21 20:36:54,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790064807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302354799] [2021-05-21 20:36:54,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:54,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:36:54,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:54,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:36:54,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302354799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:54,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:54,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-21 20:36:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385595147] [2021-05-21 20:36:54,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:36:54,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:36:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:36:54,718 INFO L87 Difference]: Start difference. First operand 33087 states and 129209 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:55,249 INFO L93 Difference]: Finished difference Result 41266 states and 153993 transitions. [2021-05-21 20:36:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:36:55,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:55,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:55,351 INFO L225 Difference]: With dead ends: 41266 [2021-05-21 20:36:55,351 INFO L226 Difference]: Without dead ends: 41260 [2021-05-21 20:36:55,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-05-21 20:36:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41260 states. [2021-05-21 20:36:56,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41260 to 33073. [2021-05-21 20:36:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33073 states, 33072 states have (on average 3.904360183841316) internal successors, (129125), 33072 states have internal predecessors, (129125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33073 states to 33073 states and 129125 transitions. [2021-05-21 20:36:56,409 INFO L78 Accepts]: Start accepts. Automaton has 33073 states and 129125 transitions. Word has length 25 [2021-05-21 20:36:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:56,409 INFO L482 AbstractCegarLoop]: Abstraction has 33073 states and 129125 transitions. [2021-05-21 20:36:56,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 33073 states and 129125 transitions. [2021-05-21 20:36:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:56,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:56,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:56,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-21 20:36:56,676 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:56,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1922155786, now seen corresponding path program 52 times [2021-05-21 20:36:56,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:56,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820462826] [2021-05-21 20:36:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:56,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:56,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820462826] [2021-05-21 20:36:56,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820462826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:56,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914179351] [2021-05-21 20:36:56,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:56,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:36:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:36:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:36:56,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914179351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:56,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:56,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 20:36:56,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211436150] [2021-05-21 20:36:56,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:36:56,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:36:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:36:56,782 INFO L87 Difference]: Start difference. First operand 33073 states and 129125 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:57,118 INFO L93 Difference]: Finished difference Result 41324 states and 154127 transitions. [2021-05-21 20:36:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:36:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:57,226 INFO L225 Difference]: With dead ends: 41324 [2021-05-21 20:36:57,226 INFO L226 Difference]: Without dead ends: 41306 [2021-05-21 20:36:57,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-05-21 20:36:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41306 states. [2021-05-21 20:36:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41306 to 33052. [2021-05-21 20:36:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33052 states, 33051 states have (on average 3.903543009288675) internal successors, (129016), 33051 states have internal predecessors, (129016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33052 states to 33052 states and 129016 transitions. [2021-05-21 20:36:58,221 INFO L78 Accepts]: Start accepts. Automaton has 33052 states and 129016 transitions. Word has length 25 [2021-05-21 20:36:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:36:58,221 INFO L482 AbstractCegarLoop]: Abstraction has 33052 states and 129016 transitions. [2021-05-21 20:36:58,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 33052 states and 129016 transitions. [2021-05-21 20:36:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:36:58,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:36:58,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:36:58,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 20:36:58,482 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:36:58,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:36:58,483 INFO L82 PathProgramCache]: Analyzing trace with hash -376083974, now seen corresponding path program 53 times [2021-05-21 20:36:58,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:36:58,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956794252] [2021-05-21 20:36:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:36:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:36:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:58,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:36:58,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956794252] [2021-05-21 20:36:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956794252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:58,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90928518] [2021-05-21 20:36:58,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:36:58,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:36:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:36:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:36:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:36:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:36:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90928518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:36:58,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:36:58,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-21 20:36:58,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653508534] [2021-05-21 20:36:58,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 20:36:58,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:36:58,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 20:36:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-21 20:36:58,599 INFO L87 Difference]: Start difference. First operand 33052 states and 129016 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:36:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:36:58,952 INFO L93 Difference]: Finished difference Result 41161 states and 153593 transitions. [2021-05-21 20:36:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 20:36:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:36:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:36:59,054 INFO L225 Difference]: With dead ends: 41161 [2021-05-21 20:36:59,054 INFO L226 Difference]: Without dead ends: 41131 [2021-05-21 20:36:59,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-05-21 20:36:59,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41131 states. [2021-05-21 20:37:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41131 to 33160. [2021-05-21 20:37:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33160 states, 33159 states have (on average 3.900660454175337) internal successors, (129342), 33159 states have internal predecessors, (129342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:00,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33160 states to 33160 states and 129342 transitions. [2021-05-21 20:37:00,168 INFO L78 Accepts]: Start accepts. Automaton has 33160 states and 129342 transitions. Word has length 25 [2021-05-21 20:37:00,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:00,168 INFO L482 AbstractCegarLoop]: Abstraction has 33160 states and 129342 transitions. [2021-05-21 20:37:00,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:00,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33160 states and 129342 transitions. [2021-05-21 20:37:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:00,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:00,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:00,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 20:37:00,426 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 79 times [2021-05-21 20:37:00,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:00,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626066177] [2021-05-21 20:37:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:00,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:00,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626066177] [2021-05-21 20:37:00,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626066177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:00,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71234918] [2021-05-21 20:37:00,464 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:00,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71234918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:00,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:00,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:00,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239785164] [2021-05-21 20:37:00,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:00,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:00,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:00,583 INFO L87 Difference]: Start difference. First operand 33160 states and 129342 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:00,925 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-05-21 20:37:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:02,639 INFO L93 Difference]: Finished difference Result 66239 states and 248356 transitions. [2021-05-21 20:37:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 20:37:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:02,830 INFO L225 Difference]: With dead ends: 66239 [2021-05-21 20:37:02,830 INFO L226 Difference]: Without dead ends: 66187 [2021-05-21 20:37:02,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 1359.6ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 20:37:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66187 states. [2021-05-21 20:37:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66187 to 38023. [2021-05-21 20:37:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38023 states, 38022 states have (on average 3.936904949765925) internal successors, (149689), 38022 states have internal predecessors, (149689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38023 states to 38023 states and 149689 transitions. [2021-05-21 20:37:04,382 INFO L78 Accepts]: Start accepts. Automaton has 38023 states and 149689 transitions. Word has length 25 [2021-05-21 20:37:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 38023 states and 149689 transitions. [2021-05-21 20:37:04,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 38023 states and 149689 transitions. [2021-05-21 20:37:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:04,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:04,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:04,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 20:37:04,652 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:04,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 80 times [2021-05-21 20:37:04,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:04,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847491355] [2021-05-21 20:37:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:04,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847491355] [2021-05-21 20:37:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847491355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855459806] [2021-05-21 20:37:04,682 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:04,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:04,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:04,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855459806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:04,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:04,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:04,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923550547] [2021-05-21 20:37:04,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:04,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:04,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:04,800 INFO L87 Difference]: Start difference. First operand 38023 states and 149689 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:06,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:06,726 INFO L93 Difference]: Finished difference Result 74432 states and 275104 transitions. [2021-05-21 20:37:06,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 20:37:06,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:06,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:06,954 INFO L225 Difference]: With dead ends: 74432 [2021-05-21 20:37:06,954 INFO L226 Difference]: Without dead ends: 74390 [2021-05-21 20:37:06,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 964.1ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 20:37:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74390 states. [2021-05-21 20:37:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74390 to 35919. [2021-05-21 20:37:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35919 states, 35918 states have (on average 3.9112422740687123) internal successors, (140484), 35918 states have internal predecessors, (140484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35919 states to 35919 states and 140484 transitions. [2021-05-21 20:37:08,337 INFO L78 Accepts]: Start accepts. Automaton has 35919 states and 140484 transitions. Word has length 25 [2021-05-21 20:37:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:08,337 INFO L482 AbstractCegarLoop]: Abstraction has 35919 states and 140484 transitions. [2021-05-21 20:37:08,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35919 states and 140484 transitions. [2021-05-21 20:37:08,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:08,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:08,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:08,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:08,599 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 81 times [2021-05-21 20:37:08,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:08,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697172476] [2021-05-21 20:37:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:08,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:08,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697172476] [2021-05-21 20:37:08,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697172476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:08,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484307473] [2021-05-21 20:37:08,632 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:08,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:37:08,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:08,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484307473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:08,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:08,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:08,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010599331] [2021-05-21 20:37:08,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:08,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:08,752 INFO L87 Difference]: Start difference. First operand 35919 states and 140484 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:10,172 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-05-21 20:37:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:10,447 INFO L93 Difference]: Finished difference Result 61858 states and 228818 transitions. [2021-05-21 20:37:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:37:10,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:10,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:10,620 INFO L225 Difference]: With dead ends: 61858 [2021-05-21 20:37:10,620 INFO L226 Difference]: Without dead ends: 61830 [2021-05-21 20:37:10,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1083.9ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:37:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61830 states. [2021-05-21 20:37:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61830 to 38738. [2021-05-21 20:37:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38738 states, 38737 states have (on average 3.9098794434261817) internal successors, (151457), 38737 states have internal predecessors, (151457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38738 states to 38738 states and 151457 transitions. [2021-05-21 20:37:11,752 INFO L78 Accepts]: Start accepts. Automaton has 38738 states and 151457 transitions. Word has length 25 [2021-05-21 20:37:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:11,752 INFO L482 AbstractCegarLoop]: Abstraction has 38738 states and 151457 transitions. [2021-05-21 20:37:11,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38738 states and 151457 transitions. [2021-05-21 20:37:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:11,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:11,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:12,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:12,020 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 82 times [2021-05-21 20:37:12,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:12,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78358495] [2021-05-21 20:37:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:12,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:12,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:12,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78358495] [2021-05-21 20:37:12,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78358495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864422917] [2021-05-21 20:37:12,052 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:12,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:12,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:12,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864422917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:12,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:12,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:12,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853276021] [2021-05-21 20:37:12,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:12,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:12,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:12,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:12,174 INFO L87 Difference]: Start difference. First operand 38738 states and 151457 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:14,117 INFO L93 Difference]: Finished difference Result 77268 states and 287634 transitions. [2021-05-21 20:37:14,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 20:37:14,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:14,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:14,334 INFO L225 Difference]: With dead ends: 77268 [2021-05-21 20:37:14,334 INFO L226 Difference]: Without dead ends: 77240 [2021-05-21 20:37:14,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 939.6ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 20:37:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77240 states. [2021-05-21 20:37:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77240 to 45925. [2021-05-21 20:37:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45925 states, 45924 states have (on average 3.9262477136137965) internal successors, (180309), 45924 states have internal predecessors, (180309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45925 states to 45925 states and 180309 transitions. [2021-05-21 20:37:15,835 INFO L78 Accepts]: Start accepts. Automaton has 45925 states and 180309 transitions. Word has length 25 [2021-05-21 20:37:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:15,835 INFO L482 AbstractCegarLoop]: Abstraction has 45925 states and 180309 transitions. [2021-05-21 20:37:15,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45925 states and 180309 transitions. [2021-05-21 20:37:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:15,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:15,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:16,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-21 20:37:16,117 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 83 times [2021-05-21 20:37:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:16,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501815751] [2021-05-21 20:37:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:16,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:16,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501815751] [2021-05-21 20:37:16,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501815751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:16,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61869077] [2021-05-21 20:37:16,147 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:16,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:16,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:16,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:16,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61869077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:16,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:16,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:16,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482365691] [2021-05-21 20:37:16,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:16,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:16,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:16,269 INFO L87 Difference]: Start difference. First operand 45925 states and 180309 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:37:16,771 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-21 20:37:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:17,910 INFO L93 Difference]: Finished difference Result 66048 states and 249082 transitions. [2021-05-21 20:37:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 20:37:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:37:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:18,096 INFO L225 Difference]: With dead ends: 66048 [2021-05-21 20:37:18,096 INFO L226 Difference]: Without dead ends: 65996 [2021-05-21 20:37:18,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 20:37:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65996 states. [2021-05-21 20:37:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65996 to 40933. [2021-05-21 20:37:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40933 states, 40932 states have (on average 3.9125378676829863) internal successors, (160148), 40932 states have internal predecessors, (160148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40933 states to 40933 states and 160148 transitions. [2021-05-21 20:37:19,411 INFO L78 Accepts]: Start accepts. Automaton has 40933 states and 160148 transitions. Word has length 25 [2021-05-21 20:37:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:19,411 INFO L482 AbstractCegarLoop]: Abstraction has 40933 states and 160148 transitions. [2021-05-21 20:37:19,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:37:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 40933 states and 160148 transitions. [2021-05-21 20:37:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:19,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:19,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:19,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:19,680 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 84 times [2021-05-21 20:37:19,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:19,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803876487] [2021-05-21 20:37:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:19,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803876487] [2021-05-21 20:37:19,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803876487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398676368] [2021-05-21 20:37:19,714 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:19,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:37:19,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:19,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:19,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398676368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:19,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:19,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:19,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209724833] [2021-05-21 20:37:19,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:19,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:19,834 INFO L87 Difference]: Start difference. First operand 40933 states and 160148 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:20,191 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-21 20:37:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:21,579 INFO L93 Difference]: Finished difference Result 67539 states and 253876 transitions. [2021-05-21 20:37:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 20:37:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:21,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:21,767 INFO L225 Difference]: With dead ends: 67539 [2021-05-21 20:37:21,767 INFO L226 Difference]: Without dead ends: 67515 [2021-05-21 20:37:21,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1146.4ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 20:37:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67515 states. [2021-05-21 20:37:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67515 to 42889. [2021-05-21 20:37:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42889 states, 42888 states have (on average 3.9317524715538146) internal successors, (168625), 42888 states have internal predecessors, (168625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42889 states to 42889 states and 168625 transitions. [2021-05-21 20:37:23,124 INFO L78 Accepts]: Start accepts. Automaton has 42889 states and 168625 transitions. Word has length 25 [2021-05-21 20:37:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:23,124 INFO L482 AbstractCegarLoop]: Abstraction has 42889 states and 168625 transitions. [2021-05-21 20:37:23,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42889 states and 168625 transitions. [2021-05-21 20:37:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:23,200 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:23,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:23,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:23,401 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 85 times [2021-05-21 20:37:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245171648] [2021-05-21 20:37:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:23,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245171648] [2021-05-21 20:37:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245171648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:23,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808921381] [2021-05-21 20:37:23,437 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:23,776 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-21 20:37:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808921381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:23,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:23,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:23,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832682727] [2021-05-21 20:37:23,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:23,874 INFO L87 Difference]: Start difference. First operand 42889 states and 168625 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:25,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:25,081 INFO L93 Difference]: Finished difference Result 73498 states and 274895 transitions. [2021-05-21 20:37:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 20:37:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:25,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:25,293 INFO L225 Difference]: With dead ends: 73498 [2021-05-21 20:37:25,293 INFO L226 Difference]: Without dead ends: 73498 [2021-05-21 20:37:25,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:37:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73498 states. [2021-05-21 20:37:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73498 to 42843. [2021-05-21 20:37:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42843 states, 42842 states have (on average 3.928574763082956) internal successors, (168308), 42842 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42843 states to 42843 states and 168308 transitions. [2021-05-21 20:37:26,684 INFO L78 Accepts]: Start accepts. Automaton has 42843 states and 168308 transitions. Word has length 25 [2021-05-21 20:37:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 42843 states and 168308 transitions. [2021-05-21 20:37:26,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42843 states and 168308 transitions. [2021-05-21 20:37:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:27,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:27,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:27,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:27,239 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 54 times [2021-05-21 20:37:27,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:27,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590496558] [2021-05-21 20:37:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:27,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:27,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590496558] [2021-05-21 20:37:27,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590496558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:27,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169001514] [2021-05-21 20:37:27,303 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:27,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:37:27,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:27,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169001514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:27,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:27,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:27,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516631725] [2021-05-21 20:37:27,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:27,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:27,495 INFO L87 Difference]: Start difference. First operand 42843 states and 168308 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:28,342 INFO L93 Difference]: Finished difference Result 48257 states and 184838 transitions. [2021-05-21 20:37:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 20:37:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:28,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:28,464 INFO L225 Difference]: With dead ends: 48257 [2021-05-21 20:37:28,464 INFO L226 Difference]: Without dead ends: 48257 [2021-05-21 20:37:28,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:37:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48257 states. [2021-05-21 20:37:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48257 to 42793. [2021-05-21 20:37:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42793 states, 42792 states have (on average 3.928608151056272) internal successors, (168113), 42792 states have internal predecessors, (168113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42793 states to 42793 states and 168113 transitions. [2021-05-21 20:37:29,503 INFO L78 Accepts]: Start accepts. Automaton has 42793 states and 168113 transitions. Word has length 25 [2021-05-21 20:37:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:29,504 INFO L482 AbstractCegarLoop]: Abstraction has 42793 states and 168113 transitions. [2021-05-21 20:37:29,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42793 states and 168113 transitions. [2021-05-21 20:37:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:29,578 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:29,578 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:29,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-05-21 20:37:29,779 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:29,779 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 55 times [2021-05-21 20:37:29,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:29,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293419357] [2021-05-21 20:37:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293419357] [2021-05-21 20:37:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293419357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141310866] [2021-05-21 20:37:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:37:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141310866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375573327] [2021-05-21 20:37:29,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:29,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:29,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:29,953 INFO L87 Difference]: Start difference. First operand 42793 states and 168113 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:30,932 INFO L93 Difference]: Finished difference Result 44296 states and 172371 transitions. [2021-05-21 20:37:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 20:37:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:31,100 INFO L225 Difference]: With dead ends: 44296 [2021-05-21 20:37:31,100 INFO L226 Difference]: Without dead ends: 44282 [2021-05-21 20:37:31,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:37:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-05-21 20:37:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 43170. [2021-05-21 20:37:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43170 states, 43169 states have (on average 3.922814982973893) internal successors, (169344), 43169 states have internal predecessors, (169344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43170 states to 43170 states and 169344 transitions. [2021-05-21 20:37:31,901 INFO L78 Accepts]: Start accepts. Automaton has 43170 states and 169344 transitions. Word has length 25 [2021-05-21 20:37:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:31,901 INFO L482 AbstractCegarLoop]: Abstraction has 43170 states and 169344 transitions. [2021-05-21 20:37:31,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 43170 states and 169344 transitions. [2021-05-21 20:37:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:32,281 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:32,281 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:32,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 20:37:32,497 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 56 times [2021-05-21 20:37:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772497086] [2021-05-21 20:37:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:32,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:32,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772497086] [2021-05-21 20:37:32,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772497086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:32,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702999800] [2021-05-21 20:37:32,537 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:32,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:37:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:32,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702999800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:32,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:32,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:37:32,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517116912] [2021-05-21 20:37:32,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:37:32,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:32,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:37:32,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:37:32,675 INFO L87 Difference]: Start difference. First operand 43170 states and 169344 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:33,559 INFO L93 Difference]: Finished difference Result 44660 states and 173461 transitions. [2021-05-21 20:37:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 20:37:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:33,666 INFO L225 Difference]: With dead ends: 44660 [2021-05-21 20:37:33,666 INFO L226 Difference]: Without dead ends: 44654 [2021-05-21 20:37:33,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 20:37:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44654 states. [2021-05-21 20:37:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44654 to 42990. [2021-05-21 20:37:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.9254925678661983) internal successors, (168753), 42989 states have internal predecessors, (168753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168753 transitions. [2021-05-21 20:37:34,731 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168753 transitions. Word has length 25 [2021-05-21 20:37:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:34,732 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168753 transitions. [2021-05-21 20:37:34,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168753 transitions. [2021-05-21 20:37:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:34,807 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:34,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:35,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-21 20:37:35,008 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 86 times [2021-05-21 20:37:35,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:35,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327543157] [2021-05-21 20:37:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327543157] [2021-05-21 20:37:35,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327543157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185425918] [2021-05-21 20:37:35,051 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:35,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:35,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185425918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:35,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:35,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:35,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950232970] [2021-05-21 20:37:35,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:35,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:35,210 INFO L87 Difference]: Start difference. First operand 42990 states and 168753 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:36,852 INFO L93 Difference]: Finished difference Result 60797 states and 230049 transitions. [2021-05-21 20:37:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 20:37:36,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:37,031 INFO L225 Difference]: With dead ends: 60797 [2021-05-21 20:37:37,031 INFO L226 Difference]: Without dead ends: 60773 [2021-05-21 20:37:37,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 860.9ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:37:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60773 states. [2021-05-21 20:37:38,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60773 to 43024. [2021-05-21 20:37:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 3.925342258791809) internal successors, (168880), 43023 states have internal predecessors, (168880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 168880 transitions. [2021-05-21 20:37:38,327 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 168880 transitions. Word has length 25 [2021-05-21 20:37:38,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:38,327 INFO L482 AbstractCegarLoop]: Abstraction has 43024 states and 168880 transitions. [2021-05-21 20:37:38,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:38,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 168880 transitions. [2021-05-21 20:37:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:38,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:38,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:38,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 20:37:38,597 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 87 times [2021-05-21 20:37:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831533099] [2021-05-21 20:37:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:38,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831533099] [2021-05-21 20:37:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831533099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108854892] [2021-05-21 20:37:38,643 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:38,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:37:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:38,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:38,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108854892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:38,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:38,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:38,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177670886] [2021-05-21 20:37:38,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:38,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:38,764 INFO L87 Difference]: Start difference. First operand 43024 states and 168880 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:40,061 INFO L93 Difference]: Finished difference Result 59275 states and 225591 transitions. [2021-05-21 20:37:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 20:37:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:40,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:40,212 INFO L225 Difference]: With dead ends: 59275 [2021-05-21 20:37:40,212 INFO L226 Difference]: Without dead ends: 59251 [2021-05-21 20:37:40,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 20:37:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59251 states. [2021-05-21 20:37:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59251 to 42990. [2021-05-21 20:37:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42990 states, 42989 states have (on average 3.925469306101561) internal successors, (168752), 42989 states have internal predecessors, (168752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42990 states to 42990 states and 168752 transitions. [2021-05-21 20:37:41,456 INFO L78 Accepts]: Start accepts. Automaton has 42990 states and 168752 transitions. Word has length 25 [2021-05-21 20:37:41,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:41,456 INFO L482 AbstractCegarLoop]: Abstraction has 42990 states and 168752 transitions. [2021-05-21 20:37:41,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42990 states and 168752 transitions. [2021-05-21 20:37:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:41,530 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:41,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:41,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 20:37:41,731 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 88 times [2021-05-21 20:37:41,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:41,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338138183] [2021-05-21 20:37:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:41,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338138183] [2021-05-21 20:37:41,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338138183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:41,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727918933] [2021-05-21 20:37:41,766 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:41,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:37:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:41,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727918933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:41,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:41,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428746118] [2021-05-21 20:37:41,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:41,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:41,891 INFO L87 Difference]: Start difference. First operand 42990 states and 168752 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:43,033 INFO L93 Difference]: Finished difference Result 75858 states and 282972 transitions. [2021-05-21 20:37:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:37:43,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:43,627 INFO L225 Difference]: With dead ends: 75858 [2021-05-21 20:37:43,627 INFO L226 Difference]: Without dead ends: 75858 [2021-05-21 20:37:43,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 20:37:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75858 states. [2021-05-21 20:37:44,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75858 to 43007. [2021-05-21 20:37:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43007 states, 43006 states have (on average 3.9260103241408175) internal successors, (168842), 43006 states have internal predecessors, (168842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43007 states to 43007 states and 168842 transitions. [2021-05-21 20:37:45,011 INFO L78 Accepts]: Start accepts. Automaton has 43007 states and 168842 transitions. Word has length 25 [2021-05-21 20:37:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:45,012 INFO L482 AbstractCegarLoop]: Abstraction has 43007 states and 168842 transitions. [2021-05-21 20:37:45,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43007 states and 168842 transitions. [2021-05-21 20:37:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:45,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:45,084 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-21 20:37:45,284 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 89 times [2021-05-21 20:37:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628911700] [2021-05-21 20:37:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:45,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:45,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628911700] [2021-05-21 20:37:45,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628911700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178141356] [2021-05-21 20:37:45,321 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:45,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:37:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:45,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178141356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:45,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:45,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:45,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786224802] [2021-05-21 20:37:45,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:45,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:45,440 INFO L87 Difference]: Start difference. First operand 43007 states and 168842 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:37:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:46,557 INFO L93 Difference]: Finished difference Result 70213 states and 263905 transitions. [2021-05-21 20:37:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 20:37:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:37:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:46,758 INFO L225 Difference]: With dead ends: 70213 [2021-05-21 20:37:46,758 INFO L226 Difference]: Without dead ends: 70191 [2021-05-21 20:37:46,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:37:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70191 states. [2021-05-21 20:37:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70191 to 42956. [2021-05-21 20:37:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42956 states, 42955 states have (on average 3.924967989756722) internal successors, (168597), 42955 states have internal predecessors, (168597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42956 states to 42956 states and 168597 transitions. [2021-05-21 20:37:48,447 INFO L78 Accepts]: Start accepts. Automaton has 42956 states and 168597 transitions. Word has length 25 [2021-05-21 20:37:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 42956 states and 168597 transitions. [2021-05-21 20:37:48,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:37:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 42956 states and 168597 transitions. [2021-05-21 20:37:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:48,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:48,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:48,734 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 90 times [2021-05-21 20:37:48,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:48,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602256829] [2021-05-21 20:37:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:48,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:48,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602256829] [2021-05-21 20:37:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602256829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971269937] [2021-05-21 20:37:48,774 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:48,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 20:37:48,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:48,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:48,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971269937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:48,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:48,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:48,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259806426] [2021-05-21 20:37:48,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:48,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:48,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:48,902 INFO L87 Difference]: Start difference. First operand 42956 states and 168597 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:49,675 INFO L93 Difference]: Finished difference Result 56698 states and 216274 transitions. [2021-05-21 20:37:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 20:37:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:49,810 INFO L225 Difference]: With dead ends: 56698 [2021-05-21 20:37:49,810 INFO L226 Difference]: Without dead ends: 56674 [2021-05-21 20:37:49,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:37:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56674 states. [2021-05-21 20:37:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56674 to 42976. [2021-05-21 20:37:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42976 states, 42975 states have (on average 3.9249098312972657) internal successors, (168673), 42975 states have internal predecessors, (168673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42976 states to 42976 states and 168673 transitions. [2021-05-21 20:37:51,020 INFO L78 Accepts]: Start accepts. Automaton has 42976 states and 168673 transitions. Word has length 25 [2021-05-21 20:37:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:51,021 INFO L482 AbstractCegarLoop]: Abstraction has 42976 states and 168673 transitions. [2021-05-21 20:37:51,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42976 states and 168673 transitions. [2021-05-21 20:37:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:51,096 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:51,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:51,297 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:51,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 91 times [2021-05-21 20:37:51,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:51,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341890425] [2021-05-21 20:37:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:51,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341890425] [2021-05-21 20:37:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341890425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184080683] [2021-05-21 20:37:51,334 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:51,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184080683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:51,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:51,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811514712] [2021-05-21 20:37:51,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:51,462 INFO L87 Difference]: Start difference. First operand 42976 states and 168673 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:52,066 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-05-21 20:37:52,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:52,391 INFO L93 Difference]: Finished difference Result 55282 states and 212006 transitions. [2021-05-21 20:37:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:37:52,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:52,544 INFO L225 Difference]: With dead ends: 55282 [2021-05-21 20:37:52,544 INFO L226 Difference]: Without dead ends: 55258 [2021-05-21 20:37:52,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:37:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55258 states. [2021-05-21 20:37:53,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55258 to 42948. [2021-05-21 20:37:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42948 states, 42947 states have (on average 3.9250937201667173) internal successors, (168571), 42947 states have internal predecessors, (168571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42948 states to 42948 states and 168571 transitions. [2021-05-21 20:37:53,737 INFO L78 Accepts]: Start accepts. Automaton has 42948 states and 168571 transitions. Word has length 25 [2021-05-21 20:37:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:53,737 INFO L482 AbstractCegarLoop]: Abstraction has 42948 states and 168571 transitions. [2021-05-21 20:37:53,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 42948 states and 168571 transitions. [2021-05-21 20:37:53,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:53,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:53,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:54,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:54,012 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:54,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:54,012 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 92 times [2021-05-21 20:37:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778817136] [2021-05-21 20:37:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:54,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778817136] [2021-05-21 20:37:54,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778817136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:54,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218698050] [2021-05-21 20:37:54,053 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:54,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:37:54,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:54,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:54,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218698050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:54,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:54,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:54,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074866357] [2021-05-21 20:37:54,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:54,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:54,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:54,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:54,179 INFO L87 Difference]: Start difference. First operand 42948 states and 168571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:54,859 INFO L93 Difference]: Finished difference Result 55613 states and 213184 transitions. [2021-05-21 20:37:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:37:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:55,009 INFO L225 Difference]: With dead ends: 55613 [2021-05-21 20:37:55,009 INFO L226 Difference]: Without dead ends: 55585 [2021-05-21 20:37:55,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 20:37:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55585 states. [2021-05-21 20:37:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55585 to 42946. [2021-05-21 20:37:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42946 states, 42945 states have (on average 3.9251833740831295) internal successors, (168567), 42945 states have internal predecessors, (168567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42946 states to 42946 states and 168567 transitions. [2021-05-21 20:37:56,327 INFO L78 Accepts]: Start accepts. Automaton has 42946 states and 168567 transitions. Word has length 25 [2021-05-21 20:37:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:56,327 INFO L482 AbstractCegarLoop]: Abstraction has 42946 states and 168567 transitions. [2021-05-21 20:37:56,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 42946 states and 168567 transitions. [2021-05-21 20:37:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:37:56,399 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:37:56,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:37:56,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:56,600 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:37:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:37:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 93 times [2021-05-21 20:37:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:37:56,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787120650] [2021-05-21 20:37:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:37:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:37:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:56,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:37:56,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787120650] [2021-05-21 20:37:56,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787120650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:56,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37100993] [2021-05-21 20:37:56,637 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:37:56,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:37:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:37:56,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:37:56,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:37:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:37:56,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37100993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:37:56,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:37:56,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:37:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181344636] [2021-05-21 20:37:56,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:37:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:37:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:37:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:37:56,771 INFO L87 Difference]: Start difference. First operand 42946 states and 168567 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:37:58,398 INFO L93 Difference]: Finished difference Result 74999 states and 282718 transitions. [2021-05-21 20:37:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 20:37:58,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:37:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:37:58,615 INFO L225 Difference]: With dead ends: 74999 [2021-05-21 20:37:58,615 INFO L226 Difference]: Without dead ends: 74999 [2021-05-21 20:37:58,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 20:37:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74999 states. [2021-05-21 20:37:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74999 to 42943. [2021-05-21 20:37:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42943 states, 42942 states have (on average 3.9248521261236085) internal successors, (168541), 42942 states have internal predecessors, (168541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42943 states to 42943 states and 168541 transitions. [2021-05-21 20:37:59,961 INFO L78 Accepts]: Start accepts. Automaton has 42943 states and 168541 transitions. Word has length 25 [2021-05-21 20:37:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:37:59,961 INFO L482 AbstractCegarLoop]: Abstraction has 42943 states and 168541 transitions. [2021-05-21 20:37:59,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:37:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42943 states and 168541 transitions. [2021-05-21 20:38:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:00,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:00,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:00,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:00,226 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 94 times [2021-05-21 20:38:00,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:00,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567126534] [2021-05-21 20:38:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:00,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:00,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567126534] [2021-05-21 20:38:00,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567126534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:00,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938391144] [2021-05-21 20:38:00,262 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:00,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:00,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:00,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938391144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:00,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:00,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:38:00,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341636526] [2021-05-21 20:38:00,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:38:00,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:38:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:00,385 INFO L87 Difference]: Start difference. First operand 42943 states and 168541 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:38:00,765 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2021-05-21 20:38:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:01,924 INFO L93 Difference]: Finished difference Result 72540 states and 274174 transitions. [2021-05-21 20:38:01,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 20:38:01,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:38:01,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:02,107 INFO L225 Difference]: With dead ends: 72540 [2021-05-21 20:38:02,107 INFO L226 Difference]: Without dead ends: 72522 [2021-05-21 20:38:02,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1061.2ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 20:38:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72522 states. [2021-05-21 20:38:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72522 to 42930. [2021-05-21 20:38:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42930 states, 42929 states have (on average 3.92459642665797) internal successors, (168479), 42929 states have internal predecessors, (168479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42930 states to 42930 states and 168479 transitions. [2021-05-21 20:38:03,513 INFO L78 Accepts]: Start accepts. Automaton has 42930 states and 168479 transitions. Word has length 25 [2021-05-21 20:38:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:03,513 INFO L482 AbstractCegarLoop]: Abstraction has 42930 states and 168479 transitions. [2021-05-21 20:38:03,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:38:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 42930 states and 168479 transitions. [2021-05-21 20:38:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:03,583 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:03,583 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:03,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:03,784 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:03,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 95 times [2021-05-21 20:38:03,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:03,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038197129] [2021-05-21 20:38:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:03,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:03,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038197129] [2021-05-21 20:38:03,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038197129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704094564] [2021-05-21 20:38:03,824 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:03,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:38:03,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:03,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:03,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704094564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:03,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:03,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:38:03,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718305650] [2021-05-21 20:38:03,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:38:03,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:03,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:38:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:03,945 INFO L87 Difference]: Start difference. First operand 42930 states and 168479 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:38:04,467 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 12 [2021-05-21 20:38:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:05,261 INFO L93 Difference]: Finished difference Result 59679 states and 226607 transitions. [2021-05-21 20:38:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 20:38:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-05-21 20:38:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:05,407 INFO L225 Difference]: With dead ends: 59679 [2021-05-21 20:38:05,407 INFO L226 Difference]: Without dead ends: 59653 [2021-05-21 20:38:05,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 941.3ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:38:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59653 states. [2021-05-21 20:38:06,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59653 to 42909. [2021-05-21 20:38:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 42908 states have (on average 3.9246993567633077) internal successors, (168401), 42908 states have internal predecessors, (168401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 168401 transitions. [2021-05-21 20:38:06,657 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 168401 transitions. Word has length 25 [2021-05-21 20:38:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:06,657 INFO L482 AbstractCegarLoop]: Abstraction has 42909 states and 168401 transitions. [2021-05-21 20:38:06,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-05-21 20:38:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 168401 transitions. [2021-05-21 20:38:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:06,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:06,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:06,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 20:38:06,926 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:06,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:06,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 96 times [2021-05-21 20:38:06,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:06,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143839758] [2021-05-21 20:38:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:06,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:06,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143839758] [2021-05-21 20:38:06,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143839758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066814827] [2021-05-21 20:38:06,962 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:06,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 20:38:06,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066814827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-21 20:38:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039356404] [2021-05-21 20:38:07,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 20:38:07,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:07,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 20:38:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 20:38:07,099 INFO L87 Difference]: Start difference. First operand 42909 states and 168401 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:08,746 INFO L93 Difference]: Finished difference Result 70768 states and 265935 transitions. [2021-05-21 20:38:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 20:38:08,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:08,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:08,934 INFO L225 Difference]: With dead ends: 70768 [2021-05-21 20:38:08,934 INFO L226 Difference]: Without dead ends: 70747 [2021-05-21 20:38:08,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 797.6ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 20:38:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2021-05-21 20:38:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 46142. [2021-05-21 20:38:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9316226349667325) internal successors, (181409), 46141 states have internal predecessors, (181409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181409 transitions. [2021-05-21 20:38:10,336 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181409 transitions. Word has length 25 [2021-05-21 20:38:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:10,336 INFO L482 AbstractCegarLoop]: Abstraction has 46142 states and 181409 transitions. [2021-05-21 20:38:10,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181409 transitions. [2021-05-21 20:38:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:10,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:10,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:10,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:10,615 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:10,615 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 97 times [2021-05-21 20:38:10,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:10,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770186001] [2021-05-21 20:38:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:10,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770186001] [2021-05-21 20:38:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770186001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236080869] [2021-05-21 20:38:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:10,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236080869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:10,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:10,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:38:10,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639873515] [2021-05-21 20:38:10,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:10,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:10,796 INFO L87 Difference]: Start difference. First operand 46142 states and 181409 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:12,008 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-05-21 20:38:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:12,426 INFO L93 Difference]: Finished difference Result 70061 states and 263721 transitions. [2021-05-21 20:38:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 20:38:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:12,615 INFO L225 Difference]: With dead ends: 70061 [2021-05-21 20:38:12,615 INFO L226 Difference]: Without dead ends: 70061 [2021-05-21 20:38:12,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1112.3ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 20:38:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70061 states. [2021-05-21 20:38:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70061 to 46133. [2021-05-21 20:38:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46132 states have (on average 3.931414202722622) internal successors, (181364), 46132 states have internal predecessors, (181364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 181364 transitions. [2021-05-21 20:38:14,050 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 181364 transitions. Word has length 25 [2021-05-21 20:38:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:14,050 INFO L482 AbstractCegarLoop]: Abstraction has 46133 states and 181364 transitions. [2021-05-21 20:38:14,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 181364 transitions. [2021-05-21 20:38:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:14,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:14,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:14,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 20:38:14,330 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:14,330 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 98 times [2021-05-21 20:38:14,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:14,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77287401] [2021-05-21 20:38:14,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:14,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:14,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77287401] [2021-05-21 20:38:14,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77287401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:14,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248330254] [2021-05-21 20:38:14,373 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:14,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:14,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248330254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:14,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:14,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:38:14,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952158030] [2021-05-21 20:38:14,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:14,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:14,496 INFO L87 Difference]: Start difference. First operand 46133 states and 181364 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:16,100 INFO L93 Difference]: Finished difference Result 66793 states and 252387 transitions. [2021-05-21 20:38:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 20:38:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:16,286 INFO L225 Difference]: With dead ends: 66793 [2021-05-21 20:38:16,287 INFO L226 Difference]: Without dead ends: 66779 [2021-05-21 20:38:16,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 20:38:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66779 states. [2021-05-21 20:38:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66779 to 46121. [2021-05-21 20:38:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46121 states, 46120 states have (on average 3.9313313096270597) internal successors, (181313), 46120 states have internal predecessors, (181313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46121 states to 46121 states and 181313 transitions. [2021-05-21 20:38:17,667 INFO L78 Accepts]: Start accepts. Automaton has 46121 states and 181313 transitions. Word has length 25 [2021-05-21 20:38:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:17,668 INFO L482 AbstractCegarLoop]: Abstraction has 46121 states and 181313 transitions. [2021-05-21 20:38:17,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 46121 states and 181313 transitions. [2021-05-21 20:38:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:17,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:17,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:17,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:17,946 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 99 times [2021-05-21 20:38:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:17,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452417669] [2021-05-21 20:38:17,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:18,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452417669] [2021-05-21 20:38:18,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452417669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:18,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282753277] [2021-05-21 20:38:18,013 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:18,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 20:38:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 20:38:18,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:18,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282753277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:18,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:18,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-05-21 20:38:18,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59071835] [2021-05-21 20:38:18,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:18,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:18,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:18,145 INFO L87 Difference]: Start difference. First operand 46121 states and 181313 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:19,507 INFO L93 Difference]: Finished difference Result 61745 states and 236680 transitions. [2021-05-21 20:38:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 20:38:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:19,685 INFO L225 Difference]: With dead ends: 61745 [2021-05-21 20:38:19,686 INFO L226 Difference]: Without dead ends: 61721 [2021-05-21 20:38:19,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 20:38:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61721 states. [2021-05-21 20:38:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61721 to 46081. [2021-05-21 20:38:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46081 states, 46080 states have (on average 3.931640625) internal successors, (181170), 46080 states have internal predecessors, (181170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46081 states to 46081 states and 181170 transitions. [2021-05-21 20:38:21,053 INFO L78 Accepts]: Start accepts. Automaton has 46081 states and 181170 transitions. Word has length 25 [2021-05-21 20:38:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:21,053 INFO L482 AbstractCegarLoop]: Abstraction has 46081 states and 181170 transitions. [2021-05-21 20:38:21,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 46081 states and 181170 transitions. [2021-05-21 20:38:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:21,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:21,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:21,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:21,335 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 57 times [2021-05-21 20:38:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228696983] [2021-05-21 20:38:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:21,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228696983] [2021-05-21 20:38:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228696983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908040242] [2021-05-21 20:38:21,377 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:21,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 20:38:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:21,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908040242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:21,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:21,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:38:21,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690720496] [2021-05-21 20:38:21,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:38:21,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:38:21,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:38:21,511 INFO L87 Difference]: Start difference. First operand 46081 states and 181170 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:22,093 INFO L93 Difference]: Finished difference Result 47008 states and 183685 transitions. [2021-05-21 20:38:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 20:38:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:22,212 INFO L225 Difference]: With dead ends: 47008 [2021-05-21 20:38:22,213 INFO L226 Difference]: Without dead ends: 47001 [2021-05-21 20:38:22,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-05-21 20:38:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47001 states. [2021-05-21 20:38:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47001 to 46162. [2021-05-21 20:38:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46162 states, 46161 states have (on average 3.9308507181386885) internal successors, (181452), 46161 states have internal predecessors, (181452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46162 states to 46162 states and 181452 transitions. [2021-05-21 20:38:23,466 INFO L78 Accepts]: Start accepts. Automaton has 46162 states and 181452 transitions. Word has length 25 [2021-05-21 20:38:23,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:23,466 INFO L482 AbstractCegarLoop]: Abstraction has 46162 states and 181452 transitions. [2021-05-21 20:38:23,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 46162 states and 181452 transitions. [2021-05-21 20:38:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:23,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:23,547 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:23,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 20:38:23,747 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 58 times [2021-05-21 20:38:23,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:23,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45681876] [2021-05-21 20:38:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:23,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45681876] [2021-05-21 20:38:23,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45681876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:23,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345481105] [2021-05-21 20:38:23,788 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:23,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:23,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:23,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345481105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:23,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:23,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:38:23,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300601439] [2021-05-21 20:38:23,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:38:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:38:23,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:38:23,921 INFO L87 Difference]: Start difference. First operand 46162 states and 181452 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:24,945 INFO L93 Difference]: Finished difference Result 47173 states and 184209 transitions. [2021-05-21 20:38:24,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 20:38:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:25,072 INFO L225 Difference]: With dead ends: 47173 [2021-05-21 20:38:25,072 INFO L226 Difference]: Without dead ends: 47173 [2021-05-21 20:38:25,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 20:38:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47173 states. [2021-05-21 20:38:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47173 to 46027. [2021-05-21 20:38:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46027 states, 46026 states have (on average 3.932733672272194) internal successors, (181008), 46026 states have internal predecessors, (181008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46027 states to 46027 states and 181008 transitions. [2021-05-21 20:38:26,344 INFO L78 Accepts]: Start accepts. Automaton has 46027 states and 181008 transitions. Word has length 25 [2021-05-21 20:38:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:26,344 INFO L482 AbstractCegarLoop]: Abstraction has 46027 states and 181008 transitions. [2021-05-21 20:38:26,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 46027 states and 181008 transitions. [2021-05-21 20:38:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:26,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:26,430 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:26,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:26,633 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 16 times [2021-05-21 20:38:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:26,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921310074] [2021-05-21 20:38:26,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:26,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921310074] [2021-05-21 20:38:26,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921310074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:26,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900402589] [2021-05-21 20:38:26,668 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:26,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:26,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:26,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900402589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:26,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:26,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-21 20:38:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158154145] [2021-05-21 20:38:26,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 20:38:26,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 20:38:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-21 20:38:26,806 INFO L87 Difference]: Start difference. First operand 46027 states and 181008 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:27,545 INFO L93 Difference]: Finished difference Result 46443 states and 182086 transitions. [2021-05-21 20:38:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 20:38:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:27,689 INFO L225 Difference]: With dead ends: 46443 [2021-05-21 20:38:27,689 INFO L226 Difference]: Without dead ends: 46443 [2021-05-21 20:38:27,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 20:38:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46443 states. [2021-05-21 20:38:28,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46443 to 46095. [2021-05-21 20:38:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46095 states, 46094 states have (on average 3.9314878292185536) internal successors, (181218), 46094 states have internal predecessors, (181218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46095 states to 46095 states and 181218 transitions. [2021-05-21 20:38:28,868 INFO L78 Accepts]: Start accepts. Automaton has 46095 states and 181218 transitions. Word has length 25 [2021-05-21 20:38:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:28,869 INFO L482 AbstractCegarLoop]: Abstraction has 46095 states and 181218 transitions. [2021-05-21 20:38:28,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 46095 states and 181218 transitions. [2021-05-21 20:38:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:28,961 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:28,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:29,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:29,162 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 17 times [2021-05-21 20:38:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:29,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722253984] [2021-05-21 20:38:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:29,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722253984] [2021-05-21 20:38:29,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722253984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405912647] [2021-05-21 20:38:29,188 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:29,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 20:38:29,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405912647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-21 20:38:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852411832] [2021-05-21 20:38:29,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:38:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:38:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:38:29,264 INFO L87 Difference]: Start difference. First operand 46095 states and 181218 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:30,052 INFO L93 Difference]: Finished difference Result 73392 states and 283504 transitions. [2021-05-21 20:38:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 20:38:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:30,246 INFO L225 Difference]: With dead ends: 73392 [2021-05-21 20:38:30,246 INFO L226 Difference]: Without dead ends: 73366 [2021-05-21 20:38:30,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:38:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73366 states. [2021-05-21 20:38:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73366 to 61230. [2021-05-21 20:38:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61230 states, 61229 states have (on average 3.9815446928742917) internal successors, (243786), 61229 states have internal predecessors, (243786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61230 states to 61230 states and 243786 transitions. [2021-05-21 20:38:31,881 INFO L78 Accepts]: Start accepts. Automaton has 61230 states and 243786 transitions. Word has length 25 [2021-05-21 20:38:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:31,881 INFO L482 AbstractCegarLoop]: Abstraction has 61230 states and 243786 transitions. [2021-05-21 20:38:31,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 61230 states and 243786 transitions. [2021-05-21 20:38:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:31,995 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:31,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:32,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:32,204 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:32,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 18 times [2021-05-21 20:38:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723075464] [2021-05-21 20:38:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:32,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723075464] [2021-05-21 20:38:32,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723075464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534608255] [2021-05-21 20:38:32,233 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:32,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 20:38:32,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:32,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:32,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534608255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:32,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:32,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:38:32,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320688794] [2021-05-21 20:38:32,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:32,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:32,372 INFO L87 Difference]: Start difference. First operand 61230 states and 243786 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:33,612 INFO L93 Difference]: Finished difference Result 62484 states and 247025 transitions. [2021-05-21 20:38:33,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 20:38:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:33,794 INFO L225 Difference]: With dead ends: 62484 [2021-05-21 20:38:33,794 INFO L226 Difference]: Without dead ends: 62484 [2021-05-21 20:38:33,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 20:38:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62484 states. [2021-05-21 20:38:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62484 to 61380. [2021-05-21 20:38:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61380 states, 61379 states have (on average 3.9795858518385767) internal successors, (244263), 61379 states have internal predecessors, (244263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61380 states to 61380 states and 244263 transitions. [2021-05-21 20:38:35,313 INFO L78 Accepts]: Start accepts. Automaton has 61380 states and 244263 transitions. Word has length 25 [2021-05-21 20:38:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:35,313 INFO L482 AbstractCegarLoop]: Abstraction has 61380 states and 244263 transitions. [2021-05-21 20:38:35,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 61380 states and 244263 transitions. [2021-05-21 20:38:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:35,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:35,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:35,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:35,629 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:35,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 19 times [2021-05-21 20:38:35,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:35,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781909422] [2021-05-21 20:38:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:35,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:35,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781909422] [2021-05-21 20:38:35,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781909422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:35,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878248758] [2021-05-21 20:38:35,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:35,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878248758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:35,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:35,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:38:35,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170684402] [2021-05-21 20:38:35,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:38:35,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:38:35,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:38:35,731 INFO L87 Difference]: Start difference. First operand 61380 states and 244263 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:36,261 INFO L93 Difference]: Finished difference Result 82749 states and 315087 transitions. [2021-05-21 20:38:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 20:38:36,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:37,082 INFO L225 Difference]: With dead ends: 82749 [2021-05-21 20:38:37,083 INFO L226 Difference]: Without dead ends: 82749 [2021-05-21 20:38:37,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-05-21 20:38:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82749 states. [2021-05-21 20:38:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82749 to 59640. [2021-05-21 20:38:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970220828652392) internal successors, (236780), 59639 states have internal predecessors, (236780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236780 transitions. [2021-05-21 20:38:38,828 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236780 transitions. Word has length 25 [2021-05-21 20:38:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:38,828 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236780 transitions. [2021-05-21 20:38:38,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236780 transitions. [2021-05-21 20:38:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:38,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:38,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:39,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:39,142 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 20 times [2021-05-21 20:38:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685248058] [2021-05-21 20:38:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:39,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:39,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685248058] [2021-05-21 20:38:39,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685248058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:39,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456266715] [2021-05-21 20:38:39,171 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:39,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 20:38:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:39,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456266715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:39,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:39,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:38:39,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514634777] [2021-05-21 20:38:39,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:39,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:39,308 INFO L87 Difference]: Start difference. First operand 59640 states and 236780 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:40,089 INFO L93 Difference]: Finished difference Result 60378 states and 238589 transitions. [2021-05-21 20:38:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 20:38:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:40,678 INFO L225 Difference]: With dead ends: 60378 [2021-05-21 20:38:40,678 INFO L226 Difference]: Without dead ends: 60371 [2021-05-21 20:38:40,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 20:38:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-05-21 20:38:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59640. [2021-05-21 20:38:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59640 states, 59639 states have (on average 3.970187293549523) internal successors, (236778), 59639 states have internal predecessors, (236778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59640 states to 59640 states and 236778 transitions. [2021-05-21 20:38:42,303 INFO L78 Accepts]: Start accepts. Automaton has 59640 states and 236778 transitions. Word has length 25 [2021-05-21 20:38:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:42,303 INFO L482 AbstractCegarLoop]: Abstraction has 59640 states and 236778 transitions. [2021-05-21 20:38:42,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59640 states and 236778 transitions. [2021-05-21 20:38:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:42,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:42,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:42,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:42,614 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:42,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 21 times [2021-05-21 20:38:42,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:42,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783194483] [2021-05-21 20:38:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:42,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:42,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783194483] [2021-05-21 20:38:42,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783194483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:42,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107248107] [2021-05-21 20:38:42,643 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:42,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 20:38:42,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 20:38:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:42,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107248107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:42,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:42,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-21 20:38:42,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878337288] [2021-05-21 20:38:42,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 20:38:42,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 20:38:42,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 20:38:42,777 INFO L87 Difference]: Start difference. First operand 59640 states and 236778 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:43,761 INFO L93 Difference]: Finished difference Result 61587 states and 241992 transitions. [2021-05-21 20:38:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 20:38:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:43,946 INFO L225 Difference]: With dead ends: 61587 [2021-05-21 20:38:43,946 INFO L226 Difference]: Without dead ends: 61587 [2021-05-21 20:38:43,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 20:38:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61587 states. [2021-05-21 20:38:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61587 to 59994. [2021-05-21 20:38:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59994 states, 59993 states have (on average 3.9657460037004317) internal successors, (237917), 59993 states have internal predecessors, (237917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59994 states to 59994 states and 237917 transitions. [2021-05-21 20:38:45,896 INFO L78 Accepts]: Start accepts. Automaton has 59994 states and 237917 transitions. Word has length 25 [2021-05-21 20:38:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:45,896 INFO L482 AbstractCegarLoop]: Abstraction has 59994 states and 237917 transitions. [2021-05-21 20:38:45,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 59994 states and 237917 transitions. [2021-05-21 20:38:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:46,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:46,009 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:46,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-21 20:38:46,210 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 22 times [2021-05-21 20:38:46,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:46,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515067866] [2021-05-21 20:38:46,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:38:46,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:46,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515067866] [2021-05-21 20:38:46,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515067866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:46,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484546698] [2021-05-21 20:38:46,231 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:46,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:38:46,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:46,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 20:38:46,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484546698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:46,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:46,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-21 20:38:46,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032076371] [2021-05-21 20:38:46,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 20:38:46,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 20:38:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 20:38:46,305 INFO L87 Difference]: Start difference. First operand 59994 states and 237917 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:46,822 INFO L93 Difference]: Finished difference Result 81683 states and 316037 transitions. [2021-05-21 20:38:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 20:38:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:47,058 INFO L225 Difference]: With dead ends: 81683 [2021-05-21 20:38:47,058 INFO L226 Difference]: Without dead ends: 81677 [2021-05-21 20:38:47,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-21 20:38:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81677 states. [2021-05-21 20:38:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81677 to 66665. [2021-05-21 20:38:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66665 states, 66664 states have (on average 3.9792541701668065) internal successors, (265273), 66664 states have internal predecessors, (265273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66665 states to 66665 states and 265273 transitions. [2021-05-21 20:38:49,349 INFO L78 Accepts]: Start accepts. Automaton has 66665 states and 265273 transitions. Word has length 25 [2021-05-21 20:38:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:38:49,349 INFO L482 AbstractCegarLoop]: Abstraction has 66665 states and 265273 transitions. [2021-05-21 20:38:49,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 66665 states and 265273 transitions. [2021-05-21 20:38:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 20:38:49,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:38:49,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:38:49,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-21 20:38:49,659 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:38:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:38:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 23 times [2021-05-21 20:38:49,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:38:49,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747942466] [2021-05-21 20:38:49,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:38:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:38:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:38:49,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:38:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747942466] [2021-05-21 20:38:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747942466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425227602] [2021-05-21 20:38:49,683 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:38:49,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 20:38:49,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:38:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 20:38:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:38:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 20:38:49,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425227602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:38:49,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:38:49,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-21 20:38:49,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223991923] [2021-05-21 20:38:49,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 20:38:49,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:38:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 20:38:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 20:38:49,781 INFO L87 Difference]: Start difference. First operand 66665 states and 265273 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:38:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:38:50,376 INFO L93 Difference]: Finished difference Result 88628 states and 338516 transitions. [2021-05-21 20:38:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 20:38:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 20:38:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:38:50,640 INFO L225 Difference]: With dead ends: 88628 [2021-05-21 20:38:50,640 INFO L226 Difference]: Without dead ends: 88621 [2021-05-21 20:38:50,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650